No, NOMP has no wallet.
NOMP just confirms that the address supplied belongs to the Bitcoin Core daemon.
Yet this "m" address appeared in Testnet corresponding to each of my found blocks, rather than the "2" address actually supplied by the daemon and confirmed by the pool.
The errors that I experienced
Daemon reports invalid transaction: 72aefa77a1b642e599788dd29e336e666b48e54e8b5fe1974dc25b316e908180
Filtering out round 1609642 as kicked cause of invalid tx
Round with height 1609642 and tx 72aefa77a1b642e599788dd29e336e666b48e54e8b5fe1974dc25b316e908180 is orphan
are probably related to the address not matching, so the issue in my mind is only, where did the "m" address come from?
After 100 confirmations, payment may be sent, but I wonder to where and I wonder if the same will happen on Mainnet.