Yes, I know about this bug. The problem is that when I added Backgammon to this site, I was not aware of this rule. And then I was short of time and had to solve more serious problems.
Please confirm if I understand the algorhithm correctly:
1) When dice are rolled, all possible moves with the first die must be checked if a valid second [and third and fourth in case of double] one can be done as well.
2) If no such move is found, dice are auto-swapped and the process repeats.
3) If still no valid move using both dice is found, player is allowed to use only one die as a legal move.
Did I miss something? I must be absolutely sure before implementing it.