Hi,
All products of all vendors ?
The discounts created in the front-end by a vendor (not the main vendor) should be applied only on the vendor products, so if it's not the case I will create a bug report for that.
For the discount on a specific product or category, it is a feature provided by HikaShop essential.
www.hikashop.com/extensions/compare-versions.html
( section "Marketing / Restrictions on discounts and coupons" )
About the price move ; with the screenshot it will be difficult to tell you (and it's related to HikaShop product page).
What I can recommend you is to check the documentation about the HikaShop customization and open a thread in the HikaShop section if you still have some troubles (given a link to a product page as sample).
www.hikashop.com/support/support/documen...ize-the-display.html
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.