It happened again

This morning I went to my doctor's appointment, just a checkup, I got there early at 9 am, my appointment was for 9:15 am. I signed in and waited to be called back. Instead one of the receptionists called me over and asked me if I had my appointment card. Unfortunately I had left my appointment card at work. So because I didn't have my appointment card they couldn't get me in that day because...I wasn't showing up as scheduled in the system. Seriously, two times in the same week I show up to an appointment and am told that I am not scheduled. So she rescheduled me for Monday. This time I am taking the card with me and calling ahead.