Oops, sorry Stash. I thought you were the original poster.
You said 13 pounds in 6 months and more weight in the lower body.
The lower body weight seems to be happening to me (that is where a lot of my muscle gain is happening) and I also have the hourglass body type. I see the lower body as a good thing since studies show that women with a more pear shape have less health problems (??).
Also, my butt got much rounder. Could that be what is happening to you? Some of my pants don't fit the same because of this. I happen to like this since I think a rounder butt is younger looking.