.471 Double Files in Exclusion List

I scanned my computer and got a FP of these two files: vcl35.bpl and vclx35.bpl which I added to my Exclusion List. I scanned the drive again and they were ignored (good). When I rebooted the machine, the Real Time Scanner picked them up again. I chose to add them to Exclusion List. Now I have 2 entries of the same files in my list. Why?