It would help if you can create a separate new enrolment link when a parent has another child attending the program (like a Preppy). At this stage we have to send the same enrolment link for the second child as for the first.
If the parent does not fill out the enrollment exactly as the first time, the system will not link the second child to the existing parent account.
Then other account is created, so the parent will have 2 accounts, one for each child.
Maybe if we can have the Child enrolment link and the parent can add there ID number, then the system will be able to recognize and match it that way.