Hi,
1 - Please provide screenshots of your configuration.
Maybe you have send some credentials in the past but the tickets are HikaShop release and not related to HikaMarket and the support I provide.
2 - There is no real setting for that ; You can use the "product template", a custom plugin or a view override to do so.
By default the product category use the data from the "product template" or the current browsing category (when the vendor is displaying the list of the products)
3 - This is the HikaMarket support forum. For your HikaShop questions ; please use the HikaShop forum section.
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.