I've only just noticed but all my posts over the last year (using several versions of WordPress and of this Facebook plugin) are not visible to other users. Only I, the author can view these posts.
You will probably tell me that its to do with the Privacy setting...
However, Privacy settings are only for a personal page.. right?
- And I am publishing to a business page (where there are no such privacy settings).
When logged into Facebook, I can see that this Plugin has successfully posted to both my personal page and to my business page. My Personal page may have Privacy set to 'only me', but even when I change this to public - it doesn't effect anything on my business page (as its a different page obviously).
If I do a test - and post a simple message on my business page by just typing in raw text - this is indeed viewable by all users - so my business facebook page works. It's just ALL posts by this Facebook plugin which are NOT viewable to anyone else.