When I make several pending moves at one time, I look through each one to be sure of what I'm doing is what I want to do. I've caught myself before doing something dumb before I did it.
If you made a mistake, you can't expect anything. It's your mistake. Be happy with what you can get. But at the end of the day - it's a game, and if he's a good owner, comes back every year, makes the world a good world, I'd just give him his guy back for a rookie level player. Everyone makes mistakes. I also don't want to own a player that I received by accident. Feels dirty. That's me, though. Like I said, he can't expect anything, he can only hope.