Why am I seeing posts from profiles I’m not allowed to see?

this happens to me, too.

I read a post and wonder "who in the world posted this?" And then, 'you are not permitted to view this profile."

Same here

thank you for asking this, now i know

You mean from people who blocked you? Or from people who temporarily deactivated their account?

This happens once in a while

The post are public any one can post but under age you cant see them

The gods of SW work in mysterious ways?

I often wonder this myself

They are no longer nude

Usually means the person posting is under age. Adults are not allowed to see juveniles accounts.