Weight gained but inches lost - how is it possible?

MyFitnessPain

I’m at my heaviest weight of 9 st 9 lbs at 5’5 but I’ve gained no inches since I was 9st and only gained 1.5 inches from my lowest weight of 8 st 9lbs.

I know I haven’t gained muscle as I haven’t lifted a thing - how has my weight increased quite a lot but my measurements are the same? I’m 27 female 27.5 inch waist 38.5 inch hips