Can he do that? please help?:
You admitted fault here and I bet that you admitted fault there too.

Read what you wrote and you will realize that you have no argument in court.

He did not write the ticket for not stopping for the stop sign.

He wrote the ticket for "failing to yield to oncoming traffic at a stop sign."

Big difference, if you were struck by cross traffic it becomes obvious that you did not yield to their right of way!

Your best bet would be to plead "no contest" accepting the courts verdict without admitting guilt, it keeps you from looking foolish by trying to argue an open and closed case, and save face at the same time.