diff --git a/src/main/python/pyes/commands/models.py b/src/main/python/pyes/commands/models.py
index 1091c98..6498518 100644
--- a/src/main/python/pyes/commands/models.py
+++ b/src/main/python/pyes/commands/models.py
@@ -59,6 +59,7 @@ def __init__(
         number: int,
     ):
         QUndoCommand.__init__(self)
+        self.table = table
         self.model = table.model().sourceModel()
         self.counter = counter
         self.position = position
@@ -66,12 +67,13 @@ def __init__(
 
     def undo(self) -> None:
         self.model.removeRows(position=self.position + self.number, rows=self.number)
-        self.counter.blockSignals(True)
-        self.counter.setValue(self.model.rowCount())
-        self.counter.blockSignals(False)
+        self.cleanup()
 
     def redo(self) -> None:
         self.model.insertRows(position=self.position, rows=self.number)
+        self.cleanup()
+
+    def cleanup(self):
         self.counter.blockSignals(True)
         self.counter.setValue(self.model.rowCount())
         self.counter.blockSignals(False)
@@ -86,6 +88,7 @@ def __init__(
         number: int,
     ):
         QUndoCommand.__init__(self)
+        self.table = table
         self.model = table.model().sourceModel()
         self.counter = counter
         self.position = position
@@ -93,19 +96,22 @@ def __init__(
         self.removed_row = None
 
     def undo(self) -> None:
-        self.model.insertRows(position=self.position - 2, rows=self.number)
+        self.model.insertRows(position=self.position - self.number, rows=self.number)
         self.model._data.iloc[
             (self.position - self.number) : (self.position), :
         ] = self.removed_rows
-        self.counter.blockSignals(True)
-        self.counter.setValue(self.model.rowCount())
-        self.counter.blockSignals(False)
+
+        self.cleanup()
 
     def redo(self) -> None:
         self.removed_rows = self.model._data.iloc[
             (self.position - self.number) : (self.position), :
         ]
         self.model.removeRows(position=self.position, rows=self.number)
+
+        self.cleanup()
+
+    def cleanup(self):
         self.counter.blockSignals(True)
         self.counter.setValue(self.model.rowCount())
         self.counter.blockSignals(False)
diff --git a/src/main/python/pyes/viewmodels/models.py b/src/main/python/pyes/viewmodels/models.py
index 15bcfb9..001f75d 100644
--- a/src/main/python/pyes/viewmodels/models.py
+++ b/src/main/python/pyes/viewmodels/models.py
@@ -344,7 +344,7 @@ def insertRows(self, position, rows=1, index=QModelIndex()):
         else:
             # for row in range(rows):
             self._data = pd.concat(
-                [self._data[: position + 1], empty_rows, self._data[position + 1 :]],
+                [self._data[:position], empty_rows, self._data[position:]],
                 ignore_index=True,
             )
 
diff --git a/src/main/python/pyes/windows/window.py b/src/main/python/pyes/windows/window.py
index 0eab90b..981cbc7 100644
--- a/src/main/python/pyes/windows/window.py
+++ b/src/main/python/pyes/windows/window.py
@@ -830,88 +830,61 @@ def moveCompDown(self):
                 )
 
     def insertSpeciesAbove(self):
-        if self.tablesTab.currentIndex() == 0:
-            if self.speciesView.selectedIndexes():
-                row = self.speciesView.selectedIndexes()[0].row()
-            else:
-                row = 0
-            self.undostack.push(
-                SpeciesAddRows(self.speciesView, self.numSpecies, row - 1, 1)
-            )
-        elif self.tablesTab.currentIndex() == 1:
-            if self.solidSpeciesView.selectedIndexes():
-                row = self.solidSpeciesView.selectedIndexes()[0].row()
-            else:
-                row = 0
-            self.undostack.push(
-                SpeciesAddRows(self.solidSpeciesView, self.numPhases, row - 1, 1)
-            )
+        table = self.get_shown_tab()
+        if not table:
+            return
+
+        counter = self.get_shown_tab_counter()
+        selected_indexes = table.selectedIndexes()
+        if selected_indexes:
+            row = selected_indexes[0].row()
+        else:
+            row = 0
+
+        self.undostack.push(SpeciesAddRows(table, counter, row, 1))
 
     def insertSpeciesBelow(self):
-        if self.tablesTab.currentIndex() == 0:
-            if self.speciesView.selectedIndexes():
-                row = self.speciesView.selectedIndexes()[0].row()
-            else:
-                row = self.speciesModel.rowCount() - 1
-            self.undostack.push(
-                SpeciesAddRows(self.speciesView, self.numSpecies, row, 1)
-            )
-        elif self.tablesTab.currentIndex() == 1:
-            if self.solidSpeciesView.selectedIndexes():
-                row = self.solidSpeciesView.selectedIndexes()[0].row()
-            else:
-                row = self.solidSpeciesModel.rowCount() - 1
+        table = self.get_shown_tab()
+        if not table:
+            return
 
-            self.undostack.push(
-                SpeciesAddRows(self.solidSpeciesView, self.numPhases, row, 1)
-            )
+        counter = self.get_shown_tab_counter()
+        selected_indexes = table.selectedIndexes()
+        if selected_indexes:
+            row = selected_indexes[0].row() + 1
+        else:
+            row = table.model().rowCount()
+
+        self.undostack.push(SpeciesAddRows(table, counter, row, 1))
 
     def removeSpecies(self):
-        if self.tablesTab.currentIndex() == 0:
-            if self.speciesView.selectedIndexes() and self.speciesModel.rowCount() > 1:
-                if (
-                    QMessageBox.question(
-                        self,
-                        "Deleting Species",
-                        "Are you sure you want to delete the selected species?",
-                    )
-                    == QMessageBox.Yes
-                ):
-                    self.undostack.push(
-                        SpeciesRemoveRows(
-                            self.speciesView,
-                            self.numSpecies,
-                            self.speciesView.selectedIndexes()[0].row() + 1,
-                            1,
-                        )
-                    )
-        elif self.tablesTab.currentIndex() == 1:
-            if self.solidSpeciesView.selectedIndexes():
-                if (
-                    QMessageBox.question(
-                        self,
-                        "Deleting Species",
-                        "Are you sure you want to delete the selected species?",
-                    )
-                    == QMessageBox.Yes
-                ):
-                    self.undostack.push(
-                        SpeciesRemoveRows(
-                            self.solidSpeciesView,
-                            self.numPhases,
-                            self.solidSpeciesView.selectedIndexes()[0].row() + 1,
-                            1,
-                        )
+        table = self.get_shown_tab()
+        if not table or (table == self.speciesView and self.numSpecies.value() == 1):
+            return
+
+        counter = self.get_shown_tab_counter()
+        selected_indexes = table.selectedIndexes()
+        if selected_indexes:
+            if (
+                QMessageBox.question(
+                    self,
+                    "Deleting Species",
+                    "Are you sure you want to delete the selected species?",
+                )
+                == QMessageBox.Yes
+            ):
+                self.undostack.push(
+                    SpeciesRemoveRows(
+                        table,
+                        counter,
+                        selected_indexes[0].row() + 1,
+                        1,
                     )
-        else:
-            pass
+                )
 
     def moveSpeciesUp(self):
-        if self.tablesTab.currentIndex() == 0:
-            table = self.speciesView
-        elif self.tablesTab.currentIndex() == 1:
-            table = self.solidSpeciesView
-        else:
+        table = self.get_shown_tab()
+        if not table:
             return
 
         selected_indexes = table.selectedIndexes()
@@ -921,11 +894,8 @@ def moveSpeciesUp(self):
                 self.undostack.push(SpeciesSwapRows(table, row, row - 1))
 
     def moveSpeciesDown(self):
-        if self.tablesTab.currentIndex() == 0:
-            table = self.speciesView
-        elif self.tablesTab.currentIndex() == 1:
-            table = self.solidSpeciesView
-        else:
+        table = self.get_shown_tab()
+        if not table:
             return
 
         selected_indexes = table.selectedIndexes()
@@ -934,6 +904,25 @@ def moveSpeciesDown(self):
             if row != (table.model().rowCount() - 1):
                 self.undostack.push(SpeciesSwapRows(table, row, row + 1))
 
+    def get_shown_tab(self):
+        if self.tablesTab.currentIndex() == 0:
+            table = self.speciesView
+        elif self.tablesTab.currentIndex() == 1:
+            table = self.solidSpeciesView
+        else:
+            table = None
+        return table
+
+    def get_shown_tab_counter(self):
+        table = self.get_shown_tab()
+        if self.tablesTab.currentIndex() == 0:
+            counter = self.numSpecies
+        elif self.tablesTab.currentIndex() == 1:
+            counter = self.numPhases
+        else:
+            counter = None
+        return counter
+
     def calculate(self):
         # Disable the button, one omptimization calculation at the time
         self.calcButton.setEnabled(False)