Some strange things are happening when I check the properties of the individual music folders.
Both songs I uploaded "sexy" and "patriarch" have 4 previous versions from
restore points but I never made any restore points or backups.
3/23/19, 3/8/19, 2/23/19 and 2/3/19 are the dates.
This seems consistent with the scans I did because I do a lot of them.
Checking for modifications of individual songs won't help because I modify the artwork
and other properties of songs a lot.
Perhaps the modifications are causing the problem because that requires access of the data?