What happens to the tiles on the third truck in a 2-player game after every turn? Is that tile(s) put back into the bag? Is it discarded, and lost for the rest of the game? Does it stay on that truck throughout the game until someone chooses it?
I don't think this was explained very well, if at all, in the rules. But after playing a few turns we quickly realized that we needed to discard the untaken truck tiles.