Comment 14 for bug 588154

Just to avoid confusion : you have to consider that inventory data is definitive, like a new starting point for all further calculations.
Whatever you record before/after an inventory, you must always make sure the quantity at the date of the inventory is unchanged.

So in a way, you do not "always want the moves of that day included": if ever you allow a past move to be inserted at a time before an inventory, then it must not change the quantity available at the time of the inventory because it was already accounted for in the inventory.