They were trying to nail me into a contract doing even more unpaid work: 'Sometimes that happens in a small company' -> 'Yes, I do the in-house IT, and it's part of the job, but I'm letting you know that it's every day' -> 'Yes, sometimes that happens' -> 'Every day is 'sometimes'?' -> 'Yes, sometimes that happens...'.
The other great comment was 'You have to expect a little overtime when you're on a good salary'. My salary is right on the national average wage - neither good nor bad by definition.