Fix some diagrams and descriptions mismatch

docs/DeveloperGuide.md

@@ -100,7 +100,7 @@ interface and exposes its functionality using the `LogicManager.java` class.<br>
 <img src="images/LogicClassDiagram.png" width="800"><br>
 
 The _Sequence Diagram_ below shows how the components interact for the scenario where the user issues the
-command `delete 3`.
+command `delete 1`.
 
 <img src="images\SDforDeleteTask.png" width="800">
 
@@ -187,7 +187,7 @@ We are using `java.util.logging` package for logging. The `LogsCenter` class is
 and logging destinations.
 
 * The logging level can be controlled using the `logLevel` setting in the configuration file
-  (See [Configuration](#configuration))
+  (See [Configuration](#2-configuration))
 * The `Logger` for a class can be obtained using `LogsCenter.getLogger(Class)` which will log messages according to
   the specified logging level
 * Currently log messages are output through: `Console` and to a `.log` file.
@@ -277,9 +277,7 @@ Here are the steps to create a new release.
 ### 4. Managing Dependencies
 
 A project often depends on third-party libraries. For example, Agendum depends on the
-[Jackson library](http://wiki.fasterxml.com/JacksonHome) for XML parsing. Managing these _dependencies_
-can be automated using Gradle. For example, Gradle can download the dependencies automatically, which
-is better than these alternatives.<br>
+[Jackson library](http://wiki.fasterxml.com/JacksonHome) for XML parsing. Managing these dependencies can be automated using Gradle. For example, Gradle can download the dependencies automatically, which is better than these alternatives:
 
 * Include those libraries in the repo
 * Require developers to download those libraries manually