Hello,
You have the "recently viewed" setting activated ; so I'm afraid it could generate some unwanted side effect on what product could be displayed in the module.
I would recommend you to disable most of restrictive settings so you will have your module display where you want, and then, activate the "related" restriction to only show related products.
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.