diff --git a/inc/utility-functions.php b/inc/utility-functions.php
index ac4305bd..9d5c7980 100644
--- a/inc/utility-functions.php
+++ b/inc/utility-functions.php
@@ -73,22 +73,33 @@ function ppseries_settings_template_tabbed_callback(){
         //activation functions/codes
         function pp_series_upgrade_function()
         {
+
             $version = get_option('pp_series_version');
     
-          if ( !$version || $version < '2.7.1') {
-              /**
-               * add newly introduced manage_publishpress_series for administrator 
-               *#https://github.com/publishpress/publishpress-series/issues/313
-              **/
-            // Init roles
-            if ( function_exists( 'get_role' ) ) {
-                $role = get_role( 'administrator' );
-                if ( null !== $role && ! $role->has_cap( 'manage_publishpress_series' ) ) {
-                    $role->add_cap( 'manage_publishpress_series' );
-                }
-            }
-            update_option('pp_series_version', ORG_SERIES_VERSION);
-         }
+            if ( !$version || $version < '2.7.1') {
+                /**
+                 * add newly introduced manage_publishpress_series for administrator 
+                 *#https://github.com/publishpress/publishpress-series/issues/313
+                **/
+              // Init roles
+              if ( function_exists( 'get_role' ) ) {
+                  $role = get_role( 'administrator' );
+                  if ( null !== $role && ! $role->has_cap( 'manage_publishpress_series' ) ) {
+                      $role->add_cap( 'manage_publishpress_series' );
+                  }
+              }
+              update_option('pp_series_version', ORG_SERIES_VERSION);
+           }
+    
+           if (!get_option('pp_series_2_7_5_upgraded')) {
+                $settings = get_option('org_series_options');
+                $settings = apply_filters('org_series_settings', $settings);
+                //add new series settings
+                $settings['automatic_series_part'] = 1;
+                update_option('org_series_options', $settings);
+                update_option('pp_series_2_7_5_upgraded', true);
+          }
+
     
         }
     }
diff --git a/orgSeries-options.php b/orgSeries-options.php
index 58920f65..36891b5a 100644
--- a/orgSeries-options.php
+++ b/orgSeries-options.php
@@ -140,6 +140,7 @@ function orgseries_validate($input) {
 	$newinput['custom_css'] = ( isset($input['custom_css']) && $input['custom_css'] == 1 ? 1 : 0 );
 	$newinput['series_css_tougle'] = ( isset($input['series_css_tougle']) ? trim(stripslashes(($input['series_css_tougle'])), 1) : 'default' );
 	$newinput['kill_on_delete'] = ( isset($input['kill_on_delete']) && $input['kill_on_delete'] == 1 ? 1 : 0 );
+	$newinput['automatic_series_part'] = ( isset($input['automatic_series_part']) && $input['automatic_series_part'] == 1 ? 1 : 0 );
 	$newinput['series_toc_url'] = preg_replace('/(^\/)|(\/$)/', '', ($input['series_toc_url']));
 	$newinput['series_custom_base'] = preg_replace('/(^\/)|(\/$)/', '', ($input['series_custom_base']));
 
@@ -223,7 +224,7 @@ function orgseries_options_init() {
 
 function ppseries_filter_admin_settings_tabs($settings_tabs){
   $settings_tabs['series_taxonomy_base_settings'] = esc_html__('URLs and Taxonomy', 'organize-series');
-  $settings_tabs['series_uninstall_settings'] = esc_html__('Uninstall / Reset', 'organize-series');
+  $settings_tabs['series_uninstall_settings'] = esc_html__('Advanced', 'organize-series');
   return $settings_tabs;
 }
 
@@ -806,6 +807,19 @@ function series_uninstall_core_fieldset() {
 	?>
 	<table class="form-table ppseries-settings-table">
     	<tbody>
+        	<tr valign="top">
+            	<th scope="row"><label for="automatic_series_part">
+                	    <?php esc_html_e('Automatic Numbering', 'organize-series'); ?>
+                	</label>
+            	</th>
+            	<td>
+                    <label>
+                        <input name="<?php echo esc_attr($org_name); ?>[automatic_series_part]" id="automatic_series_part" type="checkbox" value="1" <?php checked('1', $org_opt['automatic_series_part']); ?> />
+                    	<?php esc_html_e('Enable automatic renumbering of posts in a series.', 'organize-series'); ?>
+                	</label>
+                </td>
+        	</tr>
+
         	<tr valign="top">
             	<th scope="row"><label for="kill_on_delete">
                 	    <?php esc_html_e('Series Settings', 'organize-series'); ?>
diff --git a/orgSeries-setup.php b/orgSeries-setup.php
index 84a80e97..0c2cf072 100644
--- a/orgSeries-setup.php
+++ b/orgSeries-setup.php
@@ -124,7 +124,6 @@ function org_series_install() {
 	add_option( 'series_icon_url', '' );
 	add_option( 'series_icon_filetypes', 'jpg gif jpeg png' );
 
-    pp_series_upgrade_function();
 	}
 
     function pp_series_upgrade_version_upgrade() {
@@ -207,9 +206,11 @@ function orgSeries_roles() {
 		global $wp_roles;
 		$roles = array('administrator', 'editor');
 		$capability = 'manage_series';
+		$capability_2 = 'manage_publishpress_series';
 
 		foreach ($roles as $role) {
 			$wp_roles->add_cap($role, $capability, true);
+			$wp_roles->add_cap($role, $capability_2, true);
 		}
 		return true;
 	}
@@ -273,6 +274,7 @@ function add_settings($reset = false) {
 			$this->settings = array(
 				//main settings
 			'custom_css' => 1,
+			'automatic_series_part' => 1,
 			'kill_on_delete' => 0, //determines if all series information (including series-icon tables) will be deleted when the plugin is deleted using the delete link on the plugins page.
 			'auto_tag_toggle' => 1, //sets the auto-tag insertions for the post-list box for posts that are part of series.
 			'auto_tag_nav_toggle' => 1, //sets the auto-tag insertions for the series navigation strip.
diff --git a/orgSeries-taxonomy.php b/orgSeries-taxonomy.php
old mode 100755
new mode 100644
index fe076580..b200239b
--- a/orgSeries-taxonomy.php
+++ b/orgSeries-taxonomy.php
@@ -484,6 +484,11 @@ function series_wp_save_post($post_ID, $post, $update){
 function wp_set_post_series( $post, $update, $post_ID = 0, $series_id = array(), $dont_skip = false, $is_published = false) {
 	$post_series = null;
 	$post_shorttitle = array();
+    global $orgseries;
+
+    $settings = $orgseries->settings;
+
+    $automatic_series_part = isset($settings['automatic_series_part']) ? (int)$settings['automatic_series_part'] : 0;
 
 	if ( !is_bool($update) ){
 		return; //safety check for users on earlier version of WP (so existing series don't get messed up)
@@ -520,11 +525,16 @@ function wp_set_post_series( $post, $update, $post_ID = 0, $series_id = array(),
 
 	if (empty($post_series) || ( count($post_series) == 1 && $post_series[0] == 0 ) ) $post_series = array();
 
-
+  
 	if ( isset($_POST) || isset($_GET)) {
-		if ( isset($_POST['series_part']) ) $series_part = is_array($_POST['series_part']) ? array_map('sanitize_text_field', $_POST['series_part']) : array(sanitize_text_field($_POST['series_part']));
-		if ( isset($_GET['series_part']) ) $series_part = is_array($_GET['series_part']) ? array_map('sanitize_text_field', $_GET['series_part']) : array(sanitize_text_field($_GET['series_part']));
 
+        if (isset($_POST['series_part'])) {
+            $series_part = is_array($_POST['series_part']) ? array_map('sanitize_text_field', $_POST['series_part']) : array(sanitize_text_field($_POST['series_part']));
+        }
+        if (isset($_GET['series_part'])) {
+            $series_part = is_array($_GET['series_part']) ? array_map('sanitize_text_field', $_GET['series_part']) : array(sanitize_text_field($_GET['series_part']));
+        }
+      
 		//The "short" title of the post that will be displayed  in the OrgSeries widget.
 		if ( isset($_POST['serie_post_shorttitle']) )
 			$post_shorttitle = sanitize_text_field($_POST['serie_post_shorttitle']);
@@ -534,7 +544,6 @@ function wp_set_post_series( $post, $update, $post_ID = 0, $series_id = array(),
 		$post_shorttitle = is_array($post_shorttitle) && isset($post_shorttitle[$st_ser_id]) ? trim($post_shorttitle[$st_ser_id]) : '';
 		update_post_meta($post->ID, SPOST_SHORTTITLE_KEY, $post_shorttitle);
 
-
 		//if we don't have any changes in the series or series part info (or series post status) then let's get out and save time.
 		$p_status = $post->post_status;
 		if ( $p_status != 'draft' && $p_status != 'future' && $p_status != 'pending' ) {
@@ -579,19 +588,23 @@ function wp_set_post_series( $post, $update, $post_ID = 0, $series_id = array(),
 
 	$success = wp_set_object_terms($post_ID, $post_series, ppseries_get_series_slug());
 
-	if ( empty($p_ser_edit) ) return; //let's get out we've done everything we need to do.
+    if (empty($p_ser_edit)) {
+        return; //let's get out we've done everything we need to do.
+    }
+
+  
 
 	if ( $success ) {
 		if ( $p_status != 'draft' && $p_status != 'future' && $p_status != 'pending' ) {
 			$is_published = TRUE;
 		}
 		foreach ( $p_ser_edit as $ser_id ) {
-			if ( empty($series_part[$ser_id]) ) {
+			if ( empty($series_part[$ser_id]) && $automatic_series_part > 0 ) {
 				$s_pt = wp_series_part($post_ID, $ser_id);
 				if ( !$series_part ) $series_part = 0;
 			}
 			//If post is not published its part stays as set by user
-			elseif ( !$is_published ) {
+			elseif ( !$is_published || $automatic_series_part === 0 ) {
 				$s_pt = $series_part[$ser_id];
 			}
 			else {
@@ -603,8 +616,15 @@ function wp_set_post_series( $post, $update, $post_ID = 0, $series_id = array(),
 				}
 				$s_pt = $set_spart[$ser_id];
 			}
-
-			set_series_order($ser_id, $post_ID, $s_pt, $is_published);
+            
+            if ($automatic_series_part > 0) 
+            {
+                set_series_order($ser_id, $post_ID, $s_pt, $is_published);
+            }else {
+                $series_part_key = apply_filters('orgseries_part_key', SERIES_PART_KEY, $ser_id);
+                delete_post_meta($post_ID, $series_part_key);
+                add_post_meta($post_ID, $series_part_key, $s_pt);
+            }
 		}
 
 		return;
diff --git a/readme.txt b/readme.txt
index 442a2e56..8899bd55 100644
--- a/readme.txt
+++ b/readme.txt
@@ -130,6 +130,9 @@ Yes, you can In the `organize-series` folder you'll see a file called `seriestoc
 
 == Changelog ==
 
+v2.7.5- [===unreleased===]
+* Fixed: Stop automatic re-numbering of posts within the series #376
+
 v2.7.4- 2022-01-20
 * Fixed: Series option update message