The pool is finding roughly 1 in 3 NMC blocks. That is what is expected when the pool's hash rate is roughly 1/3rd that of the NMC network. There is no bug in the assignment of NMC either, I can clearly see that 97% of NMC block rewards have been assigned to miners. My only thought is maybe BitMinter only allocates NMC to miners that have NMC wallets set?
No, we pay out NMC to all active miners, regardless of having set an NMC address or not.