Awesome pics! You both have beautiful girls!
As a CPS Tech, I'll add my two cents about the booster.
Yes, fallon's DD is within the correct limits for her Graco Turbo booster. As fallon mentioned, the seat belt isn't buckled correctly. The shoulder belt needs to be threaded through the red shoulder belt adjuster by the head wings and the bottom portion of the shoulder belt needs to be under the arm rest, not over it. Until my kids were about 7 or 8, I always checked to be sure they buckled in correctly. Up until then they didn't always get it right.
fallon, it looks like you may need to higher the head rest on her booster a wee bit so that the shoulder belt will place correctly on her shoulder. If your vehicle head rest gets in the way, it's OK to remove it.