Had exactly the same problem, the parts number on those shoes are wrong. Send them back under the "Distance selling regs" as its no quibble refund in under 14 days. I had mine on the shelf for 6 months so I checked the numbers, corrected them and re-sold on e-bay.
You need the fully floating shoes, same as Triumph Trident / Rocket 3.
Search these part numbers, they are quick easy to get, Check, the new shoes may come with the pads.