Well I too find it difficult to comprehend all that - but as a total 'layman' maybe the previous 'paired' cardholder who actually owned the DRX280 didnt subscribe to Sly+ and the logics within the DRX280 required a 'paired' card to be looking for a SECOND input feed to make use of its FULL Sly+ logics? It just seems that it COULD have been as simple as that!
