Yes, renumbering is no problem with most albums. With this one particular album, I’ve tried renumbering the tracks in different ways but I can’t get the sequence right.
Moreover, the post-album merging Screenshot (above) shows that even after labeling the tracks on Disc 1 (Symphony movements) in the correct order, they still appear on Disk 2 (last 4 tracks).
I suspect your issue is being caused by incorrect metadata in the track files. Also check that you have added the ripped discs in a structure that is recognised by Roon for multidisc albums (box sets).
Your observation about the metadata was spot on. I transferred the same concert a second time using the identical title for each disc and found no difficulties.
Question: does the same principle hold with respect to “separating” adjacent tracks that have unintentionally merged? Perhaps there’s a link on this problem?
I found similar examples in my collection last week, but now I’m unable to locate them. I suspect use of different album titles for merging 2 discs is the problem.