WebDirect: only does [Guest] login if File Options are set to Guest Account

In IWP, if the only user that had access to the IWP extended attributes was the [Guest] user, then IWP would bypass the user login screen.

I expected it to work the same way in WebDirect, however, my initial tests showed that this was not the case:  The Login screen was coming up, even though I had only one account [Guest] that had the webDirect permissions.

I worked around this by setting File/FileOptions/Open/When Opening The File: Log in using : Guest Account.

However, this seems to have a side effect of blocking my mac (OS X 10.8.5) from remembering the file's administrator password when I'm opening it from FMP Advanced 13.

Any ideas how to get this to work as follows:

* WebDirect should bypass the login screen and just use the [Guest] account

* FileMaker Pro should remember the admin password.