Issue seems to have resolved itself over the weekend. Seems likely it was on the hosting side.
I meant that the redirect goes to the Storefront even though the url has the /wp-admin/ in it.
I have the same issue. I tried you solution and when I hit save on the admin page it redirects me to http://gsb.bga-estore.com/wp-admin/options-permalink.php. But the page that displays is Error 404 – Page not found! and not in the admin but on the store site -even though it reads /wp-admin.
