Outer Limits 4x4 Board

I have a really anoying but not very serious problem. The brake fluid resoviors comming from the booster theres 2. I fill them both up to full and after driving i find it has drained one and the other one overflowing??

any advice will help thanks.

on of the rubbers will be gone /stuffed in the master cylinder

you should be able to get it re-kitted or get an exchange one