Originally Posted by corporate-wage-slave

Putting those two cases together, I'm suspecting that there is some sort of internal price or fare for the Chase component, as a balancing sum, which ensures the actual payment is correct, but has the impact of crossing over the TFC amounts. When the ticket gets reissued with the Chase amount, the ticketing email doesn't give the full inventory of payment versus (fare + TFC + Chase balancing amount) which would give the whole story. Instead the base fare gets removed (in the above case the base fare would be just $75) and then it doesn't add up. And maybe they don't want to disclose a balancing amount. The Chase aspect was reconfigured a year ago (?) so may be the e-ticket needs to be restructured. It explains why it looks ok on this side of the pond.

It looks like the deal with Chase was "we BA don't care about the fare, we get that from the Chase relationship, but we are intensely interested in the Carrier Surcharge, so we want all $1700 of it". Another way of doing this is to say that the Carrier Surcharge gets reduced for Chase customers, in order to maintain the base fare but I can see why that didn't happen.