Privacy settings for profile pictures on facebook?

[Hannah]

I have my old profile pictures set to 'share with only me', as some are old (and very embarrassing!) but I don't want to delete them, just hide them from everyone else. I thought this would mean that only I could see them, but when I went on the 'view as --> specific person' and picked a random friend who could see my profile, you could see all of the photos that I wanted to hide when I clicked on the album. I tried another friend just in case, but it was still the same. Does anyone know why this is, and how I can fix it? Thank you so much!