Thank you for reaching out for assistance on the PowerSchool Community!
A commonly overlooked field on the registration form is the priorities of contacts. Each contact on the page has to have a different priority set. For example, Parent 1- priority 1 and Parent 2 - priority 2. Then Emergency Contact 1 should have a priority of 3.
I have attached an article below that should help walk you through setting priorities on the registration form:
A user in the community faced a similar concern and was able to get it resolved. I'd also recommend going through the thread listed below and it should assist you further with this:
Please feel free to reach out to us if you have any further queries.