Change twitter:url in Twitter Card

#1

My Twitter card has been approved, but the url shared is the canonical URL. I wish to show in message a shorted URL.
I set:

But appears still the long URL. What is the problem?

#2

Do you mean underneath the description on the card where it says “View on paroledautore.it”? The URL in the tweet can certainly be http://goo.gl/X5mfaF, but this bottom portion of the card cannot be customized. Its purpose is to inform a user of the final domain they will be directed to.