Each product is showing same discount. Discount error

[adamthomson123]

Hi, 

I have uploaded almost 200 new products in my store with csv file and all the products were uploaded successfully, and i had 400 products in my store already from last 2 years.but after uploading is finished, all the discount are showing by default £ 20. i am trying to change the discount but it is not changing on the front end. each product is showing £20 discount. please need help to solve the issue. problem is in database somewhere. I think. but i am not sure. 

 you can see the examples here. All products are £ 20 discount. don't know this problem is in the database or in the files?

Edited March 22, 2015 by adamthomson123 (see edit history)