Difficult to deal with in what way? The OR clerks are responsible for updating PeopleSoft with your info, so if there is incorrect and/or missing info on your MPRR, you need to let them know exactly what needs to be changed and keep sending reminders (it gets busy in an OR). Your best bet is to go see them in person with an ink-amended copy of your MPRR (i.e. write in what you need changed), be very polite and let them know you need it done a.s.a.p. for your CT.
If you are wondering how to get a copy of your MPRR without having to ask your clerks to print one off for you (a slow process on PS), you can access it yourself via your EMAA acct. If you don't have an EMAA acct yet, all you need to do is enter your service number on the website and you can create one for yourself. Easy peasy.
I'm considering a CT myself in the near future. The question is should I do it now (because I may end up with more Class A than B in the coming months, which would suck) or should I hold off until I get my 5's done and subsequently, my promotion (could happen as early as mid-April). The promotion means more money in the long run, not to mention the rank 'improvement' itself is a boon. I'm getting itchy, though, as I really want full-time employment in the Forces and think the Reg F is the best way for me to go.