A childhood friend of mine who's a chick got confused more for being a boy than I did. But that's because as a kid I hated having my hair cut. However that was just because I was one of those wild children who didn't care about hair cuts or clothes, I just wanted to run outside as fast as I could and ride my bike as far as I could go. I only started getting confused for being a boy when I was 17, quite often and I was out as androgynous, it's what pushed me to coming out as trans. I miss those days.
As for my mum she probably would have let someone calling me a boy slide, now a days that she knows, pft she's sure to correct them as quickly as possible.