Same songs listed as separate record

I’ve personally had this issue most with George Harrison’s All Things Must Pass album (along with other albums of his). The album’s tracks seemingly started getting recorded as a new listing—and I’m unsure as to why the songs aren’t listed, at most, as different versions of the same title (even though I cannot find these mysterious other versions of the album I was supposedly listening to before). My stats are now split between these “different versions.”