It's strange for the time of year, but not really strange in the way it ended up. The storm passed over some of the warmest watter in the Atlantic system during its life cycle.
It will have a lot more difficult of a time strengthening once it is out into the Atlantic unless it can get over the Gulf Stream. Even then, the forward speed will keep it below Major Hurricane status in all likelihood.
Looks to me like that's where it's going to be as it goes past GA.