You know that I was going to bring that up the next time we talked...
Anyway, I think that happens when you import a list of scripts twice, the second import does not overwrite the first but actually adds to it. I've found this to be a useful way to batch copy, but it's also a good way to mess up the AI scripts if you're not careful. Basically, you need to delete all of the cloned scripts in order to fix the problem.