By default, product-level discount is enabled on your WEB POS. This setting allows you to give discount per product in the cart.
To disable the setting, please follow these steps:
Open the left-side menu by clicking on the three stripe lines on the top left corner
Click on Settings and select "CARTS" tab
Disable the "Allow product-level discounts"
To apply discount for each products in the cart, please read our article on How to Apply Product-level Discount.