Look in your ButtonListener where you do your deleting. I don't see you ever setting the selectedItem (rather you try to change the selectedIndex twice).
@dacool25, please don't your questions next time once you find the solution. Other may helpful your question to learn something new.
You still remember the question Fubarable? ;)
It was a simple logic error, typo really, where his ActionListener obtained a lists's selected index but didn't obtain the selected item. I don't remember the details, no.
Ah, I haven't seen the question before. That's why ask, OP already deleted.