First Day of Work, J/K

I am finally set up to be a substitute teacher. I officially logged-in to the system this weekend and have since been anxiously, excitedly waiting for phone calls. Since I hadn't heard anything by the time school started this morning, I figured I had the day off. Then, around 8:30am I got a call for a job teaching middle school Spanish for a teacher who traveled from one school in the morning to another in the afternoon. I quickly took down all the notes and accepted the job. After rushing to finish getting ready, I jumped in the car with my scribbled directions and headed out. I decided to call the school and let them know I was on my way. It was a good thing I did because the secretary told me that they had tried to cancel that job because it was already filled. I asked about the afternoon job at the other school, and she didn't know anything about it. I called the second school, and the secretary there didn't even know the teacher. She said there must be some flaw in the system. Goodness! I hope it isn't like this all the time.