Originally Posted by
Adam1222
It seems that there was a miscommunication, as your instruction as to the outbound could be read as asking for the first two legs in the class you were initially booked, and only the last leg in business ("DL8492 in business"). I don't think that's the most natural reading, but it's a plausible one the way you drafted the request. I'm not sure what happened here, but at some point you should decide how much fighting and how much money being in F from MSP-ORD is worth, versus chalking it up to a lesson learned not to make fairly complicated changes via chat without being excessively detailed and confirming what's happening.
So in that reading they should have only changed the CDG-HEL to business, not the ORD-CDG, yet they didn't I gather. If we're speculating, maybe the agent thought that Business is not available on the domestic leg, since it's called First?