If what I am reading is correct, you are in both. Which is fine. The only difference would be, that lets say you were a Cadet MWO and a reserve Private, if you refused orders from your officers, they could charge you under the code of service discipline. Which also would mean, that if you were responsible for supervising cadets, both you and your officers will be held responsible if something went wrong and you could have reasonably prevented it.
That said, the same rules apply to a reservist who volunteers his/her time in the same way with a cadet corps. Generally there will be no problem, but if you‘re worried about it at all, stay away.