We already knew Rasmussen had a Republican lean for years. Advanced models like 538's had that accounted for (as well as the Democratic lean of other pollsters).
The point being that Rasmussen can still provide useful data for a model, as long as they are consistent in their bias. And to that extent, I think they are. It's just unfortunate for some right-wingers that they took Rasmussen's data at face value instead of properly running it through a model.
No, I'm saying it looks deliberate because the inaccuracies are inconsistent but just happen to end up giving Romney a tie/+1 result. So it looks like he started with the correct number, and then adjusted to give a tie/+1.
That as opposed to seeing him wrong R+2 everywhere.