Core is on this 1 year old AMD PC with heaps of memory running Windows 10 64 bit.
I’ve taken a series of print screens to illustrate what is happening.
First shot shows it still in 2 album form.
Second shows opening up to separate the two
Remove one album
First one OK
Second one has tracks doubled
Eliminate
The problem is still there. It seems to have happened when I merged albums, never meant to be ,merged (but done to albums with the same artist) , and then when I break them up, most of the albums come away with doubled or even tripled tracks.