They're not.
For example, I have Black Sabbath's album, Vol. 4. Under that album listing, there are duplicates for all the tracks: one set with cover art (these play and are the only ones I want to show up) and another set with no cover art which don't play. I changed the particular files on this album (moved from a 16/44 version to a 24/96), and did this for a number of albums (should have been clearer on this in the previous post), but I don't want those deleted tracks showing up. But how? They're deleted from the device (they don't show up in PowerAmp, for example, and they're not in my Windows 10 PC's handheld folder, which I sync from). It's like the entries still exist in Android MC, but not the files, and I want those entries out of there.