From what the lady in the office told me you cant claim guilty or not guilty for them. You just set up a court date to make a plea with the judge on the amount you owe. Then its up to the judge to look at the ticket and the times issued and decide what you owe.
All my tickets are like 8:10am 8;12am cause I leave for work at 8:20 and the street switches sides at 8am
Street parking rules are mon wed fri 8am-8am tue thurs sat sun 8am-8am thats exactly what it says on the signs