I'm buying a last minute one way ticket from RDU-MAB and am looking at next Tuesday, 12/11. I'm in a time crunch because I just got my visa today and am getting conflicting on information on baggage. Because this is a permanent move, I'm traveling with household items in rubbermaid bins and will probably be taking two extra. The problem is that there are many embargos right now with flights heading that way. One of the itineraries I'm looking at consists of 3 airlines-United, Copa, and TAM. Copa has an embargo on any additional baggage right now. United does not have one that seems to apply to me, and they claim that as the airline I'm checking in with that they would set the baggage allowance.

However, I'm seeing elsewhere that the first international leg sets the baggage allowance (in this case that would be Copa). Any experience?