Ship via po suggestions vs requisitions

So we just upgraded to E10 version 10.2.300. A few years ago, while working PO suggestions, I did not have to fill in the Ship Via block until I got to the PO stage. Now it is required. When working suggestions, I combine all items by supplier, then do my research from the PO Entry screen. The main reason for this is we have different GL accounts that items go to, as I am sure most folks do. At any rate, why is this required now, and is there a way to move around that? Also, PO suggestions auto populates this data based on supplier data I input, defaults if you will, but requisitions from my internal departments do not. Why would one work and another not?