Well, here's my explanation. There are alot of players out there that think that they don't have to port forward, no matter what. So they go and host a server (when they can't), and because of the new version of Blockland, servers don't show up dead, and it will continue to try to connect to a dead server.
Unless, you can connect to the SAME server once, and then you can't get in again. Then I don't know about that.