When you trade someone trading you

I'm sure this has happened to everyone numerous times while they've played here. You agree to trade someone, and timings being off, you try to trade each other at about the same time. This cancels out both trades and they are rejected.

What I think should happen is this:

Player A trades player B.

If player B tries to trade a different player, player C, send the canceled packet over to player A and send a trade request to player C.

If player B tries to trade player A shortly afterward, consider it as if they had clicked "accept" for the trade with player A. Ignore subsequent accept/reject packets in case they feel inclined to click the little box just to get rid of it.