Until We figure out why his IP was banned other than a misbehaving Master node, it is important that people follow the rules of 1 public IP per masternode or the network will ban your IP and any wallet that is also attached to that banned IP which is what ended up happening.
So no, the Block Explorer is not up to date at the moment, it should be back online tomorrow sometime. Sorry Guys..
Theoritical question: if I know the IP address of a masternode that is not mine and start my own masternode with his address as my masternodeaddr, does it mean I can ban both him and myself?