don't know if you fixed this but I thought I would how I fixed it. I came across this issue as well particularly with compilation albums.
the easiest way I found is to do the following, assuming your using windows pc:
use windows explorer to open the folder of the music files you want to modify. example: music/100 new wave hits
highlight all of the files in the folder
right click and choose properties
make sure/change album name is 100 new wave hits. this will change all of the songs in that folder to be on one album / 100 new wave hits. if you have albums for example, 100 hits of the 50's divide into each year of the 50's over ten folders, then you have to do each sub-folder. in each sub-folder you would highlight all of the songs, right click and choose properties and name album 100 hits of the 50's, 1950. then you need to make album artist 100 hits of the 50's. this will make sure that all of the songs from your 100 hits of the 50's stays in the same category, 100 hits of the 50's. then by naming the album artist by the year you will divide them into the 1950 thru 1959 years. I hope this make sense.
this is by far the easiest way I have found to solve this issue and it works very well. but you have to remember to not allow MB or another program to re-tag them.