Thanks for the replies!
I'm unfortunately tied into one possible date, and one possible flight too
! The only other option is LAN and that flight with long layovers eats up a whole precious vacation day.
Thanks Coolcoil for letting me know you haven't had much luck with the waiting game. I didn't know you couldn't select seats, so yeah, the seat map is useless. FlightStats doesn't pull that route that day, probably too insignificant a flight. Copa's roundtrips seem to be the type to only add up each segement, so no luck there.
I'll just go ahead and book, don't want to wait until a few days prior and have the flight sell out, also no guarantee of internet access once I arrive in Colombia.