On that game my game got bugged. I was trying to change 4 sheeps to the bank for 1 wood and the system did not let me. There was enough woods at the bank as well.
And I lost the game due to that. Terrible service
Leda, you had 3:1 and 2:1 ports, you cant trade 4 cards in this situation, you need to trade only 3 or 2 (for the resource you have port).