In trying to arrange an MR, aa.com produced a connection in BOS where the outgoing AA flight was scheduled to leave 10 minutes after my AA flight arrival. I know there is probably no way I could have made that connection, if I had tried to make the reservation/purchase the ticket, so I didn't even try. Is this a common glitch in their system, or if I had tried to purchase the itinerary they gave, would it have given me an error message and prevented me from doing so?