This sounds a little bit worrying, as regards the much debated legality (or not) of using MFUs on LCY-JFK.

Agree with others that miles and TPs for MFUs do not normally post automatically (my failure rate is about 90% of segments), and I rely in BA Executive Club (let's hear it for Nicci!!) to make the adjustment. Before that, the actual flights do appear promptly in my BAEC account, showing 0 TPs and 0 BA Miles. I can't recall ever seeing "Ineligible flight" against a regular MFU (where the aircraft is actually fitted with a WT+ cabin).