Why is the same car listed multiple times in a set?

Because the real set contains more than one of it! Plenty of sets ship with duplicates — a passenger set might include three identical coaches, or a freight set two of the same hopper.

So when a set's member list shows the same model three times, that's deliberate: the set is supposed to contain three of that car, and completion expects you to have all three.

What that means for you

• Your completion count expects each instance — three coaches means three toward the total.
• When you add the set, a separate Piece is created for each instance, so you can grade and photograph each physical car on its own.

See How does set completion work? and How do I add the missing pieces to a set?