thegame is right, but it has to be a balanced schedule for them to have problems, from what i've experienced... if you can work interleague stuff in, it fills the gaps (2-3 days off is the problem i see in this situation with odd # of teams).
this definitely sounds like a schedule that is not properly made. it's easy to do, if you made it by hand. if the game is creating the schedule with missing games, you may want to post in bugs..
maybe odd # of teams and balanced schedule causes both types of problems, and i just didn't notice in the past... it won't hurt either way... and other type-a's like myself can shoot down the bug report without real cause