Hi Robjen,
I had this same problem a while back. I know it may seem like a stupid question but when you go into the "Associated products listing for category listing menu 144" module in hikashop in the backend of joomla, is the "show title" option selected as "No"
Also, you can rename the module. It doesn't have to say "Associated products listing for category listing menu 144" and I renamed mine to simply "products" so that if in the eventuality that it does show up, it doesn't look too odd.
Also, check that the hikashop module is not published, and neither is the joomla part of that module. The only thing that should be published, is when you go into the hikashop menu item for that category, and you click on "associated modules" "select" button, the module referrring to should have the published option set to "yes"