Hi - we use your product along with ATUM inventory. Items added as part of the bought together offer don't discount in the cart. I did disable the multi-inventory for these products but it doesn't help. Can you advise what to do? 

https://www.bounceonline.co.za/product/pioneer-ddj-400-2-channel-dj-controller/

This is an example of the issue. 

Thanks,

Chris