Upgraded my daughter up first class for this trip, so her luggage could be 70 lbs. When checking in at Philadelphia, I was informed there was an embargo, and each could only be 50. While I realize this is Mexico and not delta, I also realize Delta did nothing to inform me!! As I told the ticket agent. She said it was because I ticketed thru a third party. I upgraded thru delta though!!! So there I am, pulling things our of suitcases, in the middle of the airport, with nothing to put them in. Not cool Delta!!! Your ever so unfriendly ticket agent was short, curt and unhelpful!!! They seem toohelpful to help you upgrade, but you think there was any mention of letting me switch back to delta comfort??? No, they had the $185 I paid to upgrade, for NO reason. Ridiculous!!!!!!!