Go to phpMyAdmin, find the cscart_profile_fields table. There will be 3 profile fields with the email name. You should correct name to b_email for email from the Billing address section and s_email for email from the Shipping address section.
Thanks thetool. I did check the field to make sure it was required and it was already required.
Thanks also ecomlabs. Those fields did need to be changed to b_email and s_email. After editing those field names in phpMyAdmin, the correct email shows up. That fixed it in my test order.