price bundle discount

Hi! I am using Alidropship Woo plugin. Yesterday, I see that some of my products are not showing discount %age correctly. For example, one product calculating 1% discount, another 7% and so on. Whereas, I have never put these value in discount field of price markup formula. I think this might...

How to sell in bundle with discount? Also, how to enable selection of different variants and qty in the landing page itself like the one in this picture?