Things to check when iTunes is splitting up your albums
Have you ever suffered from the issue that you had one album in iTunes, but for whatever reason it showed split up as two albums or more even though it had the same album name, artist settings?
There are a few things you can and should check before tearing all your hair out:
Select all the tracks from the album causing you the stomach ache -> then click Get Info.
Now, the setting that would most likely be causing your grief would be the Album Artist field. It is rather hidden but can mess up your sorting very quickly. If you set it to empty/one specific artist for all the selected items, chances are good that your troubles will be gone.
If not, there's more to check:
If it's an album from just one artist, make sure the artist is set appropriately. Sometimes hidden blanks sneak in.
The Album setting is, for apparent reasons, utmost important to keep consistent! Again, watch for hidden whitespace.
The Grouping and the Disc Number settings can bork up your sorting aswell.
Also, you might try to clear out all the sorting fields in the Sorting tab like this:
Last, but not least, have a look at the Part of a compilation preference in the Options tab.
If it's a normal album made by just one artist you might want to force it to "No".
If it's a, well, compilation, force it to "Yes".
If this still didn't solve it there could be a more severe messup. I once had this and solved it by removing the tracks from iTunes, stripping all ID3-info from the files, reimporting it into iTunes and tagging them again.