Sales Orders: Filter By Multiple Items Returns Each Order Once

Filtering the Sales Orders list by the Items filter with more than one product used to return the same order once per matching item, so an order that contained two of the products you'd picked came back twice — and the total at the bottom of the page counted rows instead of orders. Fulfilling one order could drop the total by two.

Each matching order now comes back once, the total matches what's on screen, and paging back and forth is steady. The Items filter on the orders CSV export picks up the same behavior. Sort order also gets a stable tiebreaker, so orders that share a sort value (same ship-to name, same status, same import timestamp) no longer drift between pages.