I would think more than likely it still has the 32bit Windows in your recovery partition.
I agree with Hanna1, I personally don't like recovery partitions. While they offer a quick way of reinstalling Windows they come with all the factory bloatware. Even when all the unwanted programs are uninstalled there are still certain files/folders/registry keys that are left behind.
I'd rather do a complete clean install then create a backup image before I install anything else. Clean Install Windows 7