Hello,
Since it is not possible to upload in the demo website ; you can't reach the limitations.
Afterwards, the limitation system is based on the number of files in the vendor folder ; it will not work on the main vendor.
So please provide details regarding your configuration, the content in the vendor upload folder and the test you're performing.
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.