"HELP"  G'day All,  Are there any cleaver dickies out there that can tell me how to delete a double posting which appears here

titled " Here's a thought "

I have tried everything from opening the edit on the posting and highlighting the post and then hitting the delete button, this works alright but, as soon as I close the posting, it re-appears again. 

any help to a flightless Bird would be a great.    

thanks kiwijims