I know you're trying to be helpful but saying 'blame the user' is not helpful it's insulting even if you meant it for fun.
Yes I have the settings you mentioned correct, I even double checked though it wasn't necessary. If I did not have 'group compilation albums' then
no multiartist albums, even single disc ones, would be listed as one album but movie soundtracks show up as one entry under 'various artists' in the soundtrack genre fine. If I did not have 'treat multidisc sets as a single album' enabled then
single artist multidisc sets would show as two entries under their respective artist but they show correctly as one. The only thing I didn't have the same was "DISC-TRACKNUM. TITLE (ARTIST) in behaviour, and sbox display type" because that's not how I want them to display anyway but changing that did not fix it. So your ideas are settings I have correct already and things I've already messed around with, like I said I'm not a noob and I've tried quite a few things.
I'll attach a picture with tags from Foobar2000 so I won't be blamed for improper tags user error, note that the column on the left is folder structure, it's on my main PC but simply copied over to the server. On the bottom left is The Wall which shows up fine as one album under 'Classic Rock->Pink Floyd->The Wall'; in the middle is a compilation with many artists which shows up as two entries, one per disc but both entries the same exact 'Logic Trance 2' under 'Electronic->Various Artists->Logic Trance 2'; and on the right is a compilation album of two discs with one artist per disc, these show up as one entry under 'Electronic->Fatboy Slim->Essential Selection Vol. 1' and 'Electronic->Paul Oakenfold->Essential Selection Vol. 1' See the inconsistency with those two?
http://i114.photobucket.com/albums/n...istDiscTag.jpg
Right now I'm trying one thing again even though I've tried it before. I deleted the Logic Trance 2 directory off the server, did a full rescan, added it back and am doing a full rescan as I type. A few times when other things didn't show up quite right full rescans fixed it. *Nope, that didn't fix it. And scanning with your suggestion of title format, even though it shouldn't matter when you change that, actually messed up the listings, it pulled two tracks out of the compilation album and put them under their own artist listing which it had never done before...yeah blame the user

I have another idea to try which has to do with the directory structure although if that's it I'll be surprised and annoyed because I'm kind of anal about how my stuff is organized. As you can see the directories for the multidisc sets are directly under their genre, I will try putting them under a 'various artists' folder (that is where my anal retentive hackles raise up) if that works it would show that SC isn't consistent (blame the user though!) because my single disc multiartist soundtracks have the same directory structure just without the extra one for multidisc and show up fine: music\soundtrack\album title\tracks versus music\electronic\album title\album title {disc #}\tracks