I dont know if I've done my stats right. I'm 9 st 3 and 5ft6 only 3 pound off target, as far as I know Im in the normal range. I certainly dont look underweight anyways I am size 12.
Thank goodness for that Becky lol , I did think it may be your height but thought I would check lol
But as you are already a healthy bmi I think your average loss is very good x
I am a plodder and I only ever manage a 1lb loss each week or sometimes a STS, but I take medication which has weight gain as a side effect, so as long as I don't gain, I am happy with what comes along each week.