Used stamps exchanges.

how long does an exchange have to travel before it gets deleted from list? I have one that has been traveling 84 days!

Please keep in mind that each sent exchange means one slot used. This means that if that letter does not reach its destination, the receiver will lose one slot and the sender wont receive a slot for that exchange.
Please contact your partner to see if it was not registered by mistake.

It should expire after 90 days, though it wil, still be at your list and can be registered after that. But a new slot will be open for you. Right now it really doesn't matter, as there are too few members yet, so no one to send to anyway. We need more members here LOL