Unable to delete files

Hi, I have a clip jam, version 1.12, and having read some info on this forum this morning, I downloaded Music Tag so that i could get some sensible order to my files.

All seemed to be going well. I deleted each folder then reinstalled the newly tagged one.

I know have 3 random tracks showing under Albums which I had deleted and retagged, but cannot find on pc screen to delete.

Any ideas please?