I should be thankful he lasted until day 3

DS1 started preschool this week. Some family members predicted that he would be kicked out by today, others were generous enough to believe he would last at least two weeks. We got the first "behavior notice" note yesterday. DS1 had some "difficulty" staying with his group during the field trip to the bowling alley, and continues to try to go out the back door of the classroom onto the playground at inapproprate times. While he is still "...new to the school, teachers and rules and an adjustment time is expected," the director would like us to work with him to "handle this behavior, for his own safety." First off- is it bad that my first reaction is "wow, I was afraid he'd done something really wrong"? I mean, considering his personality, wandering onto the playground is pretty minor. No tantrums? He didn't threaten to bite anybody? Nothing was thrown in frustration? That's a good day, in my book. Secondly- I will be glad to talk to him, to try to "handle" the behavior, but these are the people who are with him all day. The onus is on them to react to the behavior immediately, and I'm just a support mechanism for it. I'm paying $200 a week, they'd better be doing some teaching, y'know? It may be a bumpy year...