Vista - Duplicate files??

Greetings,

I am using Foldershare on three computers and am loving the service. It
solves a lot of sync problems for me. The one thing I have noticed is I have
duplicate files on at least one machine. These files have the source file
name with the originating computer nickname attached. I assume this is
Foldershare's way of telling me I have same name files among the three
machines, but FS can't determine if its the same file?

Comments?