Temp Solution

After a quick glance at the google help, and quick advise from CP. We identified the problem may due to the blogspot users.

Blogspot will automatically add a slash - '/' at the end of the url hyperlink and this causes the content detector from BGT blocked the post. However, no matter how and what I try to omit the slash it will still auto prompt.

At the end, I set the blogspot setting for not using wysiwyg mode and BINGO. It works, even with the '/' at the end of the link. Weird...