Icarus
I've been referring to a document called BR3 to try to understand whether what you are offering as your GCSE equivalents would match what is asked of Officer applicants.
Para. 0756 seeks to clarify the equivalents in the modern Scottish system.
What it says is "Within a National 5, a student will receive a grade A to D. There is no A* however grades A to C map across to the equivalent GCSE grade (A to C). Therefore, where the matrix currently stipulates that a candidate must hold a GCSE A* to C, this will equate to a National 5 grade C or above."
A quick calculation suggests to me that you might be missing 2 at N5 level and that one of the missing 2 is Maths.
Can you say how you have calculated your UCAS points?
PS You will need to run this past the AFCO as well, just for confirmation.