Moving one item into a collapsed item
 

If I drag an item into a collapsed item, the moved item winds up in the top row of the collapsed item, above all the other sub-items. If I don't want it there, I have to hit the disclosure triangle, open the collapsed item, and move the moved item from the top row to where I want it.

Is there a way I can move an item into a collapsed item and have it wind up at as the last sub-item, and not the first?

If you hover over the collapsed row, it will temporarily expand allowing you to drop the row where ever you want. Note this does not yet work in OO4.