Its maddening. Thank you very much for the testing. I never get good support from Squarespace. I haven't in years. It's always cut and paste responses. Wherein here, on the forums, I usually get answers that work. For the free assessment form, I am creating a basic non-biz gmail account to autorespond with a link to the prep page. Thats a lot of extra work. I have no clue what to do with the others ones I note and you tested.
It also makes no sense that Squarespace charges more than MailChimp to add email marketing, and yet there is no first name only option (versus requiring first and last name), which has been best practice for years.
Like I said, friend. Maddening.
Thanks again for the attempt at helping!!! And for confirming the issue.