Hi,
( Mohamed will be unavailable in a next few days )
Can you change the configuration in your canada post and check if the prices changed in HikaShop ?
Maybe the Canada post can give you some details but I am really not sure for what I see.
I guess that they (canada post) will be more helpful than us for such question.
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.