AA exp checked in, with DW and lap infant. Boarded the flight, flight delayed 30 minutes while they figure out manifest issues... Came to us, said they couldn't figure out the issue with our tickets, but they tried to fix it for the past 40 minites, so asked us to deplane so other passengers don't miss their connects. Very respectful, so we complied.

Flight was a paid fare (no miles or anything, fwiw).

Came back to the terminal and they figured out that the infant ticket tax hadn't been paid, so they asked me to pay for that. Somehow this was missed when we checked in this morning and checked two bags in for the infant. The gate agent who had checked us was pleading his case to his manager ("I checked them all in myself"). Since AA doesn't issue boarding passes for the infant, we only got the two boarding passes for the adults.

Anyways, by the time they figured this out, all flights had left. There was a chance to have us fly out through another connection, but the last two seats were given to two standby passengers after we were in the terminal. The lead gate agent confirmed that to me "I'm gonna have a talk with him afterwards, he should not have out them ahead of you".

Anyways now they're trying to book us on United so we get to our final destination tonight... (2 hours later than expected). Otherwise we will need to overnight and rebook for tomptomo.

They have been very respectful so far.. My question : .is this IDB, and are we owed any compensation? Not sure whether this qualifies for IDB (since I'm unsure about the manifest issue wrt infant).

Any guidance? Thanks in advance.

Deadlee

*Edit - detailed update in post below.
flight was from the US, connecting in Dallas to toronto. We were deplaned off our flight to Dallas.
Missed the subsequent United connection and now stranded in Denver overnight. United waived all responsibilties since american stock ticket, and AA on twitter "still looking into the matter.

Details in post below