Course combinations

Hello everyone,
I just finished my fundamentals except for F7 and i intend to write four papers i.e F7, P1, P2 & P3 this december which was made available for me for registration at the ACCA website.

My problem is i want to be sure that this availability for the registration wasnt a glitch as i have a couple of friends who registered for exams and werent allowed to write them because they had a degree and thus were excused for exemption on the exam day.
The point is this was done on the exam day which i must say would be a relieve for some but as to my situation i would have wasted time concentrating on a subject i wouldbnt be writing which would give me lesser advantage in gaining high marks in the rest of the courses as to time invested.

Please, i would someone to enlighten me on this issue and i would be very be appreciative if this is done ASAP.