"Parking charge"

I have just received a parking penalty of a possible £70. It would appear that I stayed 13 seconds too long ,yes that's right,in the car park. At the pay point they ask you to take a note of the time of entry,in my case 10.17 was printed on the ticket. I noted the time on the machine near the exit and exited at 1044 When the penalty arrived it times your entry and not when you purchase the ticket . Although seconds are not printed on the ticket it would appear the computer counts in seconds. All too ridiculous. Unless you give a printed time of entry and exit how on earth can we be expected to know if additional payment is required. Of course on appeal they have waived the fee as a gesture of goodwill. Why are our hospitals dealing with such spurious companies?