It could be possible your both in normal PoS and are seeing orphan blocks; most likely staking normal PoS + Masternode. Start over; have staking=0 in the conf file, then make a new masternode address and privkey then  send 20k to that address. So just remove just the privkey line from the conf, then open the wallet, create new node, then add the new privkey to the conf where the old one used to be, reopen+begin