Hi,
"Order creation notification" and "order status notification" are for the customers.
"Order notification" is also for the customers, this email is used in the backend, when you edit an order and click on the "email" button. The two other are the automatic sent emails.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.