“High” settings is a relative term. One clinic may think they’re high, another may not. Plus, there are several variables that constitute a “setting”, so it’s hard to tell what they consider “high”. Can you find out specific numbers?
Shedding takes 3 weeks. Whatever hasn’t shed OR is growing as usual (legs often see pepperspots, which are hairs stuck in follicles - but they’re not growing) after 3 weeks has been missed or treated at low settings.
6 weeks apart is too early for legs. Legs have long hair cycles and shouldn’t need treatments more than once every 12 weeks or so if things are being done correctly.
Please let us know if any of the hair is growing as usual at 3 weeks (not just stuck in follicles). Also, please call them and find out the settings used. Joules, spot size, and pulse width would help most.
Are you in a package or can you switch clinics?
How coarse is your hair?