I'm looking to add three drop down list controls to my smartform that are dependent on each other, that the user can select multiple options from and all selections would then be saved.

An example would be a sales order where you can choose colour, size and amount and add to your cart and then choose the same item in a different colour, size and amount.

It seems like it should be simple enough but I can't get them to link back to my original smartobject.

I've created the composite smartobjects and have got the three levels saving into a smartobject table, but I don't know how to transfer them back to my original smartobject - e.g. it will save blue, size 10 x4 as one entry, and pink, size 10 x3 as another entry in the composite smartobject, but i can't figure out how to link that back to the order.