sale price

why my product price change and sale price change automatically every day. Even though I have set the product and sale price for a certain time period on the product page but every day both of that changes. I am running a 50% off FB campaign and I have set the regular price of 50 dollars and...

Hi, Is there an easy way to setup a sale price on a product? I have lot's of products with different variations and setting the sale price one by one its painful lol Thanks