prof plum: That was the same for me too. Although I took an 8 week re-course at IOT, the 6 month cross-over to Fg Off with 30 months still stood so my last 8 weeks on IOT I was being paid as a Fg Off.
Good luck with IOT
(I did some research and had I not been recoursed, I would have graduated as Plt Off - and be listed under 'Eng Branch: Graduating As Pilot Officer' in the Times - and held that rank for 3 days after graduation. As it happens I graduated as a Fg Off. All because IOT at that time was 3 days short of 6 months long)