How to remove a post from your network?

I dont think you can change the link now. You need to submit your post again on Indivine

But the same URL cannot be posted again..

Looks like some complicated issue.

The URL you submitted and the correct URL are looking the same in the browser address bar but when I copy the URL you submitted into notepad, the string '%EF%BB%BF' is getting appended to the end of the correct URL.  To me, it appears to be some problem on IB's side. You can contact IB here and mention this thread in your mail. 

Try submitting the same post or another post from your blog. It you continue to experience the same problem, ( %EF%BB%BF ), then it could also be some problem at your end.

http://en.wikipedia.org/wiki/Byte_order_mark 

Just checked it. The page redirected from IB and the one which actually have the post have the same URL. 

Have you made any recent changes to your blog ?