Need to save original iterables for insertion into grafted list

[eob]

List 1:
List 2: are List 1, with graft on each item
Form 3: Appends to List 1

List 2 will mess up when Form 3 appends to List 1 because List2 clones an ALREADY GRAFTED subtree. It should clone the ungrafted subtree, and then render, first pulling from List1 and then performing the graft.