Hello Paul,
I also think it is important to to keep songs from an album together.
There are three reasons why songs from the same album may not be grouped together
- The album names of the songs may differ slightly
- The songs from the same album may have different artists
- Not all songs in the album have the same "Album Artist" assigned to it
I recommend reviewing the following article for an issue like this. The article will help you correct the album information in iTunes so that when you sync, the content gets transferred over appropriately:
Why aren't songs with the same album art grouped together?
http://support.apple.com/kb/TS1468
I hope this helps get your music back on track!
Best,
Sheila M.