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Anyone know why this happens and how to make it show only one instance of each?

Multiple instances

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marked as duplicate by bassplayer7, Mark, patrix, bmike Feb 17 '13 at 14:21

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

That was it guys. Thanks. – Mike Feb 16 '13 at 23:37
up vote 2 down vote accepted

From the comments, I was able to resolve this using the following command:

/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user

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