DJLegba, thanks for the subsequent guidance. I will try that after Bob's tips.
Bob, can you give me the steps to add a smartlist? I presume once I do that I can delete the suspect files. Also, would it be cleaner if I wiped the library and imported brand new. I raise this option as there are times I have tried to do that, but it appears that the library is never fully wiped as the import happens way too fast. The only thing that is slow is the import of the album artwork (or something to that extent- I'm not home at the moment). That doesn't seem right.