There were two events at the school last week. The first was on Monday, called Parent Orientation. The note next to it says: See Email for Information. (This is basically what you are describing) The second event was on Wednesday, called Meet Your Teacher. The note next to it says: New Students.
This is the calendar that is published on their website, so I'm not privy to any information. Just reading those words, I understand that parents go on Monday and students, just new students, go on Wednesday. I would assume since the kids met the teacher and got to know the school on Monday that on Wednesday, it was a practice for regular drop off. The teacher, aid, whoever meets the kid at the car, they open the door, and someone brings them in. If they start with the parents walking them into school on day1, that cycle will never get broken And this is a Montessori school that encourages independence. No hugging or long goodbyes. Push your kid out and speed away.