Not sure if this will help but: I passed both pilot and observer but was offered observer. I asked for my name to be put through the AIB selection again (having been advised that this could result in one of 3 outcomes, 1. Pilot, 2. Observer, 3. Rejection) and got the same offer about 2 weeks later. I then submitted my application to the RAF, raced through their selection procedure and ended up doing 12 happy years in RAF as a pilot.
Good luck whichever way you go, but I would say that time is on your side and its worth having at least one more go at pilot.