Can an imported order have more than one product in it?

Not with the current order import. Each row in the CSV becomes one separate order with one product line, made from that row's product_name (or sku_code), quantity and price.

If you put the same customer on three rows, you'll get three orders, not one order with three products.

For an old order with several items, you can:

• Import it as one row and enter the full order value as the price, with a product name like "Order 1045 items"
• Or import the first item, then open the order and click Edit to add the other products and Save changes