ipod not syncing certain artists..?

Every once in a while my ipod won't sync a certain artist. Is there a limit on how many songs can be under one artist? I have one catagory that I put all the 'top 40' singles and random songs under (50+) and sometimes under that artist on the ipod only one or a few songs will show up HOWEVER the songs are there and I can find them under 'songs' and 'albums' but again they dont show under the 'artist' i designated. Why is this?

Are you sure your id3 data is correct on those songs? It sounds to me like you're missing the artist id3 tag.

forgot to mention this happens at different times. It used to be correct then one day only displayed a few songs under the artist and went back to normal the next time i sync'd it up. So normally its correct but every once in a while it wont display all the songs under the specific artist even after i resync it

I have a 1st Gen iPod and it does the same thing. What gen is yours???