Delivery problem for Movement type 601 & 940

Hi

I have created SO & Then delivery

But when i am checking Goods Movements data, there are 2 different movement types showed for one DN/SO for different material with same issue plant .

Could you please tell me the cause of this issue.

Whay it is coming like that. What setting i have to check.

I need to explain User on this Pls tell em what exactly i should check and confirm to USer

Kindly help