Quite simply, this Friday I don't know if I am flying home to the US or to Paris (from LHR). I don't want to lose getting a decent seat on these flights and I have no status. My plan is to check in to both flights, select my seats, and as soon as I know where I am headed I will cancel one of the tickets (both are fully refundable).

Is there a problem with me being checked in to both flights at the same time? Will BA cancel one of my tickets? Will anything bad happen?

Thanks in advance everyone.