How to Delete Application Deployment Package that was accidentally added to 2nd Application

[BenAvdicevic]

All,

As you can see below - I am having trouble deleting an Application Deployable Package from an Application Deployment Architecture.

Steps to reproduce

1. Create Application App-1
2. Create Application Deployment Architecture Diagram for App-1
3. Create Application Deployable Package called "Front-End" and finish editing the diagram
4. Create Application App-2
5. Create Application Deployment Architecture Diagram for App-2
6. Create Server Port
7. Select Server Port, then select the right-arrow, then select Application Deployable Package object to create new connection to App Deployable Package.
   
8. Type "Front-End" and select the "Front-end" package - which was created for App-1
   
9. Select the existing "front-end" package and select Add to complete the wizard.
10. DONE.   Now, if you try to remove "front-end" from App-2, you can't.  There is only the "Delete" option and not "Remove" option. 
    
    So - how do I remove it?

[BenAvdicevic]

This issue begs the question.

Why are Application Deployable Packages reusable between applications? 

What is the best practice when creating Application Deployable Packages?

Do we need to "prepend" the name of the Application.  For example,  "App-1 Frontend" , "App-2 Frontend" etc...