Why you have people that don't know have to put an order or just don't like customer service 4o minutes waiting and she shows up saying she forgot to put the order .

It sounds like your server was new or inexperienced, it was pretty nice of them to be honest about their mistake to you. Things happen.

That people take a job that they should never do. But it is still important to take care of the customer the best way you know how as a waiter or waitress.