Resource pool duplicate resources

I have been using a resource pool with the same master project for months, and everything has been working fine.  Maybe I'm mistaken, but I think I remember a dialog popping up that might have said something like "do you want to fix the resources in your Resource Pool?" That's not even close, but for the life of me, i cant remember what it said, I barely even read it, and clicked "OK".  Now all of the resources in my resource pool are duplicated once for each subproject that I have.  When I go to add a new resource, dozens of the same resource show up in my drop-down list.  Does anyone know what may have happened, or how to fix it?  All of these resources have actual time recorded, so I can't just delete them.  is there some way to merge them?

Am I correct in that all resource information is stored in the resource pool, so any changes need to be done there, right?  I also noticed that if I go to "Resource...Resource Pool...Share Resources...", my master project is at the top of the list, but all of my subprojects are also listed below.  Is there some magic that I can work by breaking these links and restoring them?