Hi,
There is a bug in the plugin paysera which save the entire $dbOrder instead of just saving a little "$order" object with the required values.
It result that the entire order is saved and the useful information about notification or email are not passed to the function.
That's why the email is not like it should be.
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.