I found only 7 offending albums in my entire library that didn't group correctly. Here are screenshots of their metadata.
Also, the notes for foovert aren't clear on where to input some of the filters.
ie, it doesn't say where the location for the following codes are:
-- Sort
$replace([$stripprefix(%album artist%)|][%date%|][$swapprefix(%album%)|][$num(%discnumber%,1)|][$num(%tracknumber%,2)|],",,'',-,' ',)%path_sort%
-- Filename (Music folder)
$replace($if2(%album artist%,Unknown Artist)\$if2(%album%,Unknown Album)\[$ifgreater(%totaldiscs%,1,%discnumber%.,)][%tracknumber%. ]%title%[ '('%track artist%')'],<,'[',>,']',",'''',:,,?,,*,,)
I found the location for Sort from earlier in this thread, but I cannot find the place for the filename code.
Lastly, the readme says to set the playlist filter to "Hide on playlists" but while the notes says to set it to "Hide on Playlists"