How to show all discounted products in single category

-- HikaShop version -- : Business 2.6.4.
-- Joomla version -- : 3.6.5.

Hello!

I'm making e-shop for client, and I've purchased Hikashop Business - so far so good, and I've mostly found a way to do most of the things that customer wanted for the shop. But I've stumbled across these two things that I couldn't figure out -

1. Customer wants to apply fixed discounts for some products every other week. He does it through Orders>Discounts, and applies fixed sum as discount to individual products, as necessary. Client also have category called "Special offers" where he wants to display all products with discounts at that moment. Following problems arises -

• To show all discounted products in separate category, client is now forced to manually edit each product that he have applied discount to, and temporarly add it to "Special offer" category by hand (and remove it from category after the discount period has ended)
• Client is using time-based discounts (automatically starting and ending), and as a result he doesn't want to manually edit the products each time when discount starts or ends

Isn't there any easy way to simply display all products that has discounts applied at any given time?

2. In hikashop options I've set default discount display as "Old price New price". While this works when client opens product page, in all other category and product views discount is instead showed as "(discount amount) Price". I don't understand, where else I have to change this option to work as expected across all the shop? I'm not using any modules or Hikashop menus - just a single button "Shop" in the main navigation, and I have set discount view to "Old price New price" there as well, but it simply doesn't work outside product view...

Anybody?
First of two mentioned questions is very important for my client, as it makes no sense to do job twice for each product - first make a discount for it, and then manually edit product to assign it to "Offer" category... It kind of makes sense to provide such functionality by default - it seems very obvious feature to display all products with discounts with single click.

Hello!

I created a new menu item "Product listing", as you suggested, pointed it to root category of all products, set the option "Discounted only" to YES, but it still shows ALL products, not only the products with the discounts...

EDIT: Interestingly, I fiddled around this issue, and possibly found a bug in Hikashop - I went to "Discounts" section of the Hikashop back-end, and there was some 50 or so products with timed discounts, that have already ended some weeks ago. I deleted all discounts, except the ones who are active right now, and suddenly my Discounted product listing menu item started working correctly!

Can you please look in to this issue? My client is constantly using time-based discounts, and if a single product, whose discount time is over, breaks discounted product list, is pretty terrible...

I confirm.

Applying a timed discount kills the listing of 'Discounted only' and all items will be listed, instead.

It is a serious problem.