RE: No size gains, just strength?
Scales are a computer, and computers rely on measurements. Most will give 3 similar readings if you do three in a row, whether they measure the bodyfat exactly accurately is another matter. Most don't tell the difference between someone who exercises regulary. and someone who doesn't. They also state they may be inaccurate for athletes or bodybuilders.
Main question you need to ask yourself, how do you look in the mirror in comparison to when you started. Do you look like you have gained 5% BF?
Bench 37.5kg x 11 dumbells (40kg x 5)
Squat 140kgx6 (with proper form now)
Quit again: about October 2009