Some Categories are asking for customer to sign in

I have some categories that will take the customer right to an account sign in dialog where there shouldn’t be one. Others go right to the category page without the extra dialog for sign in. I searched the forum and can’t find anything about this. Does anyone know why this is happening?
Stumped in Mesa, AZ

It does not look like default functionality. Please check 3rd party addons installed

Thanks. I don’t believe I have anything that controls it but I’ll dig into it.