PAH - restrict editing

Greetings!

We are getting ready to launch Print at Home and I'm wondering if anyone has advice on how to restrict the editing of the PDFs that a patron receives.  I have been testing myself and the PDF itself comes back Secured.  However when I open the PDF in Adobe Acrobat Pro DC, I'm able to click Edit PDF, it asks for a password and I click cancel, then there is a Restrict Editing button that is checked but I can uncheck it and edit any content I want.  Anyone else seen this?  Any ideas on what I could be missing?

Thanks!

Jenny