In eCart 4 you will need to do this manually. In the cart display manager, select the first option you want to display to create the column
after the display is created, you can go to the bindings panel and expand the eCart binding group and drag the other option column bindings into the column that was created.
We've upgraded our eCart from 4 to 5 and have discovered that we are able to group, however the group show up on everything that is ordered and in the cart. Our goal is to not have the grouped items listed unless selected by the customer - this is important because our form will have about 5 other areas that we need to use this same technique. Please advise to how we can have the items selected and only show the selected items - one other issue is that we are not seeing the selection we make - we see all of the selection options - I've attached the files to this post - Thank you.