Why do all products in a sale show as being part of a Promotion when only some are included?
- Vend for Mac or PC
This is just the way Vend displays the Promotion on the receipt, the actual discount amount is calculated correctly. It only happens when it's the same product placed repeatedly on separate lines. If the Promotion involves other/unique products, it will appear as expected.
You can avoid any confusion by adjusting the quantity of the one product if it's going to be bought multiple times.