Matrix is bringing up the following for those flights:
Fare 1: Carrier BA IQN8A2G5 NYC to LIS (
rules) Passenger type ADT, round trip fare, booking code A, J Covers JFK-LHR (First), LHR-LIS (Business). US$2,014.00
Fare 2: Carrier BA INN4C1G3 OPO to NYC (
rules) Passenger type ADT, round trip fare, booking code J, A Covers OPO-LHR (Business), LHR-JFK (First). US$1,614.50
Total cost for 1 passengerUS$5,502.15
That may not necessarily be what you're seeing though - doesn't match the fare code you quote. For reference the first fare component said non-refundable and the second had a $200 cancel fee.