After two weeks of waiting to get to see a doctor, eventually getting an appointment, lets say for 2pm. You get there for 1:45. 2:10 there are still people going in before you, but it's fair enough, they were there before 2, and the appointments may be taking longer than expected.
Then someone come in at 2:15 and is seen before yourself. If his appointment was before yours, then he's missed it FFS.