[kailanb]

Transport for London does the same. If you add your (real, CPAN) card number to the "Contactless and Oyster" web service, it will also add all of the DPANs you have tapped in with on their network as separate cards.

[rswail]

Yes, the DPANs have to be tracked separately so that you use the same device/card to enter as you do to exit.

You shouldn't be able to see anything about the DPANs except the 6+4 information though and perhaps some detail of which device it is on.