Booked main cabin flight, waited for automatic upgrade to Comfort+ (am Plat Delta member) and then changed the same flight to First, used some remaining eCredits to bring the cost down to <$250; showed up today as additional collection, meter will hopefully move in the coming days (will report if it does not):


This charge shows up as "Additional Collection" in the 'main charge area', not just when I click on "Additional Information".