Firstly, thanks for replying :)
Everything in the module manager shows as purchased apart from the SU-25 Grach, A10A (FC3 editions) and P51 (which as I said, I don't own).
Those two both show with $14.99.
All my serials are under the same account and I am reluctant to reinstall as it burns activations.
I always dread reinstalling ED games because more often than not, there are problems (at least for me) :(
EDIT
Hmm, for some reason, they are now gone - so I guess it just took a reboot to update it.
Thanks for your help all the same bud :D