What software do they use to allocate seats for some specific flight that is not aware of the actual aircraft configuration? It can't be legal to carry passengers without a seat? No seatbelt, no life vest, but possibly pax oxygen.
My parents told me from the 1960s when on vacation in Bulgaria they were on a short flight so much overbooked that passengers (including them) had to stand in the aisle during the entire flight and one flight attendant had to sit on the lap of a seated passenger.
