Well that's a good sign of she's rebooked hun remember it looks different on everyone, so maybe the 8% is just darker on you anyway?!
As for the thighs being darker... As the thighs are a larger area and stick out slightly more than the shins (haha, I know what I'm trying to say! Lol) I always go ever so slightly closer when spraying the bottom half of the legs. If you get what I mean?! Haha. I'm rubbish at trying to explain things! X
Your not rubbish at explaining, I can understand what you wrote perfect xx