Hi,
I guess you create a menu "id 15" where you put the cart module.
And in your checkout workflow there is the cart too.
If you open the checkout with the menu id 15, you will see a "double cart" but it's logical because it's confirmed like that.
Please create a menu only for the checkout and use configure the option "force checkout menu" to use this new "checkout" menu.
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.