tiarita,
I have the exact same issue. However, I was able to have the short code [pmpro_account], on a sign up page, but the as of today the plugin is now redirecting to ‘page.com/wp-login.php. So I know it is possible to create what you’re looking for.
However, as of yesterday this design broke on the site and now have the exact same issue you have. Is there a fix for this?
Adrian
thank you in advance