FD: No we didn't get off the plane. I made 2 separate reservations and had different seats assigned. I got the boarding passes for all 3 flights (MIA-MGA, MGA-SAL, and SAL-GUA) in Miami at checkin. No one asked for the 2nd leg boarding pass, so I asked 1 of the stewards and he took the airline portions out to the agents.
I believe the stop in MGA on TA514 was about 1/2 hour for cleaning and getting a "new" set of passengers. We were the only ones connecting so there were a lot of people getting off and a whole new set getting on.