Scientifically Annoyed

Before school started, I got half way through organizing and making an inventory of lab supplies. I stopped because it was taking me way longer than I was expecting and I had to prepare other things for the school year. I have done a little here and there since but have not had a significant amount of time to work on it. I came to the school today for the specific reason to organize the lab. The director came and opened the school for me. He knew why I was there but he gave me a lecture about how I need to make an inventory of the lab supplies while I was doing it. What? Isn't that the reason I am here? It is like telling someone in the middle of washing the dishes that the dishes need to be washed.
Also, why am I the only one who needs to be doing this? I'm not the only science teacher in the school. I worked on this for 3 full days before school started. The other high school science teacher worked on it for about a half hour. The middle years science teacher has not worked on it at all. They didn't even let me have the classroom off the science lab because the other teacher claimed the she was going to be using it more. I think this is a clear cut case of take advantage of the new girl.