Hi,
You're using some cache ; your cart is not empty but the pages are store in cache with the "empty cart" message, even if it's not the case.
You'll find a lot of thread in this forum which explain that HikaShop is not compatible with Joomla cache (or template cache) ; you have to disable it.
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.