Well it was monthly, but over the summer there was about a two month delay. Then it was smooth enough sailing until about September, and then there was another two month (or more) delay till the end of November when 32 came out. So I'm guessing they are just making up for lost time. My understanding is that Kirkman is a bit overwhelmed with his increase in stuff for Marvel, so unfortunatly the Walking Dead is taking a back-seat.