Typically, a citation can be re-issued or amended. However, there are some limitations, such as how much time has gone by since the initial ticket was issued, and you may have a basis to have the ticket dismissed "again."
I would call the clerk's office for the Court, or if you have time, even go. Sometimes paperwork crosses & you end up with two different answers. I would concur that the citation can be reissued, but an amendment shouldn't matter if it was dismissed. The last date should control. Whatever you do, don't just ignore the calls - you must take some action.