I'm going to take Meursy's advice and delay hosting by 24 hours so we can straighten this out. For those of you who are interested here is the sequence of events:
Meursy brought it to my attention that Mictlan was staling. I posted for a sub for a couple of days but got no response. Since LoloMo was kind enough to set Man to AI earlier in the game I PMed asking him to do the same for Mictlan (I probably should have PMed him earlier than I did but I wanted to see if a sub would appear). He did not get my PM until after hosting, meaning Meursy did not encounter the AI nation he expected during his attack. When Ossa volunteered the "turn to AI" orders had been submitted but the turn hadn't hosted so I felt it was my responsibility to have the nation taken over by a sub rather than an AI. The problem of course, that I hadn't really considered, is that Meursy had put the resources into an attack expecting an AI to attack him. And that's where we are now.