You already have a ticket so I don't know what the cop could possibly have meant. Asto your title question typographical errors on your ticket will not invalidate it, especially if they can be corrected in court by the issuing officer.
Negotiating a good resolution given the circumstances of your case will take an attorney familiar with the policies and procedures of the court where the matter is pending.
It may be worth your while to consult with a traffic attorney familiar with the judges and practices in the court where you received the ticket to explore your options.
Check with a lawyer in your locale to discuss more of the details.
Good luck to you.
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