lucy24 - 7:35 am on Nov 16, 2012 (gmt 0)
Obvious technical question: are both kinds of googlebot (plain and mobile) crawling both sites? Don't trust anything other than your logs for this one.
Does your mobile site have a different URL, or is it all done invisibly behind the scenes? Can you put together a custom search and see if you get both versions of your site on the same SERP at the same time?