They test prices and see how things move.
I think this is the case. When I lived in Minneapolis (Target's HQ), Target were in abundance and in competition with each other, so sometimes one store would have higher prices than another. And it seems in January, they raise prices by a buck or so to see if the demand would still be there with the higher price. I know I paid the extra since there were some good figures out at times, but eventually, they went down... sometimes to the original price, sometimes to maybe $.50 more.
I don't think there's a reason to panic yet about this. As of now, I'm up to date on figures and the next release is supposed to be in the spring (right?). I think it would be slow goings for SW at the moment. Plus, it doesn't make sense on Targets part when they have been shipping partial cases until the holidays, so I would think that they don't have faith in the product to stock it fully.