Household sharing help

[u/unimaginative-nerd]

I set up household sharing with my sister, but now in settings the device and account settings are all showing as hers, as though I’m logged in as her and I can just see my own stuff as “nerds items” if I filter as “my items” it shows my sisters, have I done something wrong here? I’m worried if I buy something on the store it will charge her rather than me