1- should add as Category or page? these will be shop pages- the link you sent is for elementor, I dont use elementor. and I dont have that option you are showing: https://prnt.sc/oKBx6Y53AYYl
2- first it was only one, then you did something with website (I think when you fixed the menus for me, then since then there are 2). I dont know why is that and if this will cause any problem?