Actually I tought there was a limit of the number of sitting you can take each time... But I had a look on LASORS and JAR-FCL 1 Subpart J, and they don't mention anything about it...
Anyway you better ask your FTO... They have to sign you application form, and they might not be happy to sign 9 sittings for you...
Good luck for your exams, keep it going... It's just a matter of months...
amcapt89