Kudos to MaximusPrime as well, as he hit the nail right on the head.
I assumed you had the Disc# set as well.
I usually just use the Album Artist because multi-disc set ordering isn't an issue with me as I consecutive order the tracks on all sets,
then I keep a record of the original order at the end of the track. I also don't have tons of greatest hits albums. I just forgot about all that.
Anyway, glad you got it working

.
I don't believe I've ever seen it written somewhere on the site other than being mentioned in posts.
I just figured the ctrl thing out myself, back in the day.