I am the admin to several businesses pages on Facebook, and your comments could be hidden and you don’t know it.
Facebook has settings that will hide a comment at times if the comment is written in all caps or contains a link. Now, you might be thinking, “I see my comment”, that is true yet no one else can see it except the page admin. Facebook does this to help prevent spam comments being made.
Also, a comment like this will be hidden: WOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
So to make sure that your comment is seen on a business/fan page, make sure not to write in all CAPS and be careful addding links.
Another way to look at this is, Facebook is wornikg hard to make the internet less useful for those of us who value our privacy too much to have a Facebook account…