Oh wow. So that’s what it’s doing. I could see it was ignoring most metadata that other software would use, but never thought of that.

Great to have an answer, but a shame it’s such an incredibly stupid one!

Edit: With the help of a python script made by Claude I’ve made things better.

But even now that things are ordered correctly many albums ”start” at track 10 and finish with tracks 1-9, so I have to scroll back to go to track 1. Madness.