I’m sorry this created a tailspin for you. That’s so rattling. See how Friday goes. You may discover that while the school you thought would be a first choice, something else is a better fit.
I agree that sometimes schools just can’t make perfect host matches for everyone. It’s everything from who is available to host to how many visitors can be accommodated in each classroom.
Years ago, I was a parent volunteer at DS’ school’s revisit day. At the end of the day, a girl came back and was telling her dad that a group of them had been “trading” which class they’d attend after lunch based on interest, and that in the process, she got left behind in the dining room. I was feeling somewhat horrified. Apparently another student, not a host for the day, saw her and took her to her next class. So far from what admissions had planned! As the girl finished her story, her take was that it was a place where people took care of each other.
(She enrolled. )
This is all to say that on one hand, not all plans are well made and things can go wrong. Revisit days are for most schools a big undertaking, and there are so many moving pieces that they can’t be perfectly orchestrated. On the other, one of the reasons you spend a day is to pick up the vibe. Perhaps your son can visit again and sit in on a higher level class? The clock is ticking, so fingers crossed that your concerns can be addressed.