Hi Just found this ...if it hasn't bee mentioned before:

includes/languages/english/orders.php

Line 92 define('EMAIL_TEXT_STATUS_LABEL', '<strong>New status:</strong> %s' . "\n\n");

Should just be one \n

as is it produces in the email a double message:

Your order has been updated to the following status:
New status: Delivered Delivered
Please reply to this email if you have any questions.