I checked out your link and I am not seeing what in the client list makes you think it is a republican poll.
under Service Areas -> Political Campaigns
Doesn't mean the poll is not valid. It also gives a different view of the race by measuring the candidates' bedrock of support and allowing for a higher neither/undecided number.
McCain probably isn't ahead in Michigan, but this poll suggests it's not the 5-7 point Obama lead that other polls say.