The discs are compilation discs you made yourself, correct? You made them from several different CD Albums, correct?
If both the above are true, MC is correctly ripping the tracks and identifying the source albums they come from, I would suspect. The source album name is probably imbedded in the tracks as tags. (Unless you asked MC to look up track information in the online database.)
If you wish to show the tracks from your homemade compilations as albums themselves, you will need to make up your own album name, for example "My Compilation Number 17", or anything else you may wish to call it, and then do some tag editing.
Did you rip each of your compilation CDs into their own directory? If so, use the MC Standard View and drill down to the location of your CD rips, using Audio -> Files -> [your hard drive] -> [your directory structure] until you are displaying directory that the ripped tracks are sitting in, then select "All Locations" so that MC displays all the album tracks that it knows about in this directory.
You will be able to see in that view the Track Name, Artist, Album, etc. Edit the Album tag for each track to your new compilation album name.
Done? Go back and view Audio -> Albums and find your compilation album in there, with all its tracks together, as you planned.
PS: I am no expert in this area, but this is what I would be doing. You may want to search the forum for discussion about "compilation albums", with or without the quote marks. You will find lots of discussion about them, although lots will be about commercial compilations rather than homemade ones.
Enjoy the flexibility of JRiver MC!