I think you may have been told to add a meal as you can't do SS once you have reached BMI 25+ a stone and I think you may be close to that
I know it feels as if you want to lose more with SS,but the real success when dieting is to get to goal and stay there.I have found listening to people in maintainance is that those that worked through the plans gradually while retraining their eating habits are the ones that keep the weight off!
I have lost nearly 7 stone and it is really tempting to keep going with SS for as long as possible and it has been a huge leap for me to start working up the plans