Duplicates in a batch
Two copies of one card can go on one listing with a quantity of two.
Duplicates on one listing
Two copies of the same card do not need two listings. Smart Combine puts them on one listing with a quantity.
A line above the table counts the cards scanned more than once. Press Show duplicates to see only those rows. The Duplicates row in the Filter menu is the same switch.
A row with a loose twin carries a Combine button beside its name, and the button says how many copies it found.
To do a whole batch, tick the rows, press More and pick Combine duplicates.
Two cards are duplicates only when the name, set, number, finish and condition all agree. A Near Mint copy and a played copy stay two listings.
Splitting cards back apart
A copy combined onto another listing keeps its place in the batch. The count under the table says how many are combined, and Split puts every one back.
A combined copy stops counting as a card of its own, so two cards on one listing count as one card on Batches.
The quantity goes to eBay, to the other channels and to every export file.