So, pretty interesting.... I'm down here leaving Panama and they are making everyone pay the $2.50 AGAIN, because they don't see it reflected properly in their system.

Since the amount is so small, and most people don't realize they've already paid it, they are all forking over the cash again.

Guess there's no real incentive for United to fix this programming error, as it's allowing them to clip an extra $200+/flight (practically the equivalent of one extra discount economy passenger).