as long as you are eating less calories than your bodies uses you will lose weight honey. ketosis helps a lot with hunger pangs though, which is why it isn't a good idea to eat carbs, and of course if you eat anything other than packs then weight loss is slower.
try upping your water intake a bit. it's possible that you are retaining lots of it. i drink up to four litres a day, but usually more like three. 2.25 is the minimum.
and at least you lost a lb!! last week i gained 4lbs after being on ss and we figured it must be water retention, so at least you are going in the right direction. just think about it. if you hadn't been doing ss+ you would have GAINED even if it's just water weight. which is even more gutting, trust me. a lb is a loss at least!!
abz xx