Hi,
The issue with the bid button comes from a javascript error on have on that page:
i.imgur.com/xeDGeSB.png
This prevents the javascript of HikaAuction from being properly initialized, leading to the button not responding properly.
So I've investigated this javascript error, and it comes from HikaAuction's javascript not finding HikaShop's when first initializing itself for some reason. In the file productauction / show_auction, it has the code:
window.hikashop.ready(function(){
counter.start();
});
Replace it to just:
via the menu Display>Views and it will prevent this particulat javascript error, without changing the behavior of the counter system. That should in turn allow HikaSerial to initialize itself and the bid button should then work properly.
Regarding the display of the add to cart button on listings, you can hide them for only one category.
For that, you can add such CSS code on your website:
.hikashop_category_listing_xxx .hikashop_cart_button{ display: none; }
where xxx is the id of the category.