Unable to Post to Facebook as Admin User

Trying to get your Ultimate Facebook app working on a client site (www.givingfoundations.org), but running into an issue posting to the test Facebook page in some situations. Here are the 3 scenarios:

1. logged into Facebook as a user with admin-level access to the app/FB page
2. logged into Facebook as any other user (most will fall into this category)
3. not logged in to Facebook at all

It seems only scenarios 2 and 3 are allowing me to post. Scenario 1 still claims to have posted, but nothing shows on the FB wall. Here are the blog and FB page I have been testing with:

http://www.givingfoundations.org/kyle/
https://www.facebook.com/apps/application.php?id=172155019528866&sk=wall

I am running v 1.4 of this plugin. Any suggestions?