Yep IAS, youre not alone. There are many of us who have hit the same problem, several bursars/post EFT on a UAS - it makes no sense.
How many times have you been through OASC? If you have sat all but the new 5 tests twice then you are in the same boat as me. You can only attempt each test twice so that would mean you could only do the new 5 once more (assuming they dont change the tests). If however you have only sat them once, then again last week, on your next appearance, you will be able to sit everything again giving you twice for the old, twice for the new.
Hope this makes sense but Im, although a bit older, in an identical situation - my maths was from a calculator generation. The only saving grace, you can improve on basic numeracy fairly easily which could well be enough to haul up your other scores, plus you have at least another crack at trace etc. Dont forget, there is every possiblity the weighting/testing will change again in the next year. Also on the positive, your stick and rudder type tests were fine - the only ones you really can change are the DST/numeracy ones, the rest really are a case of you can either do it or you cant (to me the definition of aptitude) worth another go?
Rgds
Ninj