That's explained by the old domain being on co.cc, since Google blocked indexing of all sites on that domain quite some time ago. With Google picking up the new domain here and now indexing the site since the domain is not on their blocked list... there you go.
Based on it being newly picked up by Google and thus being "fresh", the tide of spammers might hopefully decrease after a while.
I'm considering setting up an old member or two as Global Moderator to handle these when I'm not around.
That's excellent to hear. I just wanted to offer in case there was a lack of time, manpower, etc.
Looking forward to the next installments! Please let me know if there's anything I can do to help.