Hi,
The module "VM Manufacturer" (the screenshot you took) has nothing to do with the current category. It will list all the manufacturers, regardless of what category you are browsing at that time.
But there is one more place to browse the products from the manufacturer:
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This will only list the "manufacturer" that has products in that particular category.
You may disable the "VM Manufacturer" module if you think it might confuse buyers, because this is not a module that comes with our template. It is the official VM Manufacturer module.
(or change the module title and name it something else inetad of "Shop by Manufacturer")
Regards,
Support