playBunny: Can you describe a class of illegal moves that is different to what we're discussing?

You have two stones left, on your 4 and on your 7. Opponent has 2 stones on your 3. You roll 3-4. You can't swap the dice (or at least, according to the rules, you shouldn't be able to swap the dice) because you are not allowed to move with the 4 first.