Missing?

So I get a phone call from the Elementary school this morning....its automated and says that my son is not in school today..........um....ok thats a problem. So I call my husband and make sure he dropped him off at school....sure enough.......so now my heart is racing and I am starting to panic......I call the school and tell them about the phone call I just got.......they call down to his classroom to make sure he is there......the secretary says he is there and sorry for the scare.....whew! So then when I pick up Z from school I ask him about it, and he says there is another boy in his class with the same name that was absent today, his teacher obviously accidentally marked my Z as absent. Oh well, just as long as my son isn't missing I'm good. Hopefully this won't happen again. The funny thing is when Z did miss a day of school a while back for being sick, I never got a phone call....weird.