It might be a bug, but the networksolutions.com checkout process also acts opportunistically when you add a domain to a new account. It will ask if you want to 'auto-renew the purchased domains AND all others you previously purchased'. If you change the setting to 'don't auto-renew' and then make a validation error (miss the terms of service checkbox), it will keep state for all other fields, but magically the auto-renew value switches back to the default.
