I have both an Amex MBNA Elite Credit Card and Platinum Charge Card and have managed to transfer points to Skywards miles from both. I also have a Companion (to the Charge Card) Credit Card but am unable to transfer points. I have phoned American Express three times and they have not been able to come up with an explanation. I phoned Skywards today and they have stated that you are only allowed to have one card linked to a Skywards account but this doesn't really make sense as I have two Amex cards linked already, and the Companion Card and Platinum Charge Card are supposed to be linked in any case.

Anyone encountered similar difficulties?