Sync Member registration form with Contacts?

If this doesn’t work for you then change the wixUsers.register part to this.

wixUsers.register(email, password, {
       contactInfo: {
        "firstName": $w('#firstName').value,
        "lastName": $w('#lastName').value,
        "email": $w("#email1").value,
        "position": $w("#position").value,
        "phone": $w("#phone").value,
        "how they heard": $w("#dropdown1").value,
        "organization": $w("#organization").value,
        "address": $w("#address").value,
        "grade level": $w("#gradeLevel").value,
        "comments": $w("#moreinfo").value