Myra, but the DIN seems pretty clear to me and surely you have just misinterpreted it? Not sure how a Service Complaint is going to help as they will just consider if the policy has been applied? Anyway, our discussing it keeps bouncing it back up the top! I doubt thatt many would be affected anyway, as it would likely only apply to a very few FTRS and even fewer PAS re-joiners? Even then how many would have had it incorrectly applied?
I know there have been a couple of officer aircrew overpaid when RRP(F) changed in 2017 and have recently been presented with a ‘public debt’ on their pay statements. That’s not nice when it happens but it is always up to us to check our pay statements carefully (I’ve been doing that for a while now).