There is a bug in the OFCp Progressive games.
When you are in fantasyland and have the opportunity to play a full house on the bottom and another full house in the middle, you'll be prompted with an error message upon clicking the "Play" button. The error message reads something along the lines of: "Your hand is fouling. Are you sure you want to play this?".
Thought I was going crazy triple and quadruple checking my hand looking for the error (there wasn't one).
It sounds like you were playing OFC 2-7, where the middle row is the best low hand, and anything over a 10 low is a foul. Thus a fullhouse would be a foul in the middle. Check your hand history to see if this was the case.