Sometimes people have found that certain atomizers fail to make the electrical connection with their USB passthrough. But, that's often worked around by just trying a different atomizer, or even by pulling up the center pole a bit on the atomizer that's not firing, so that it makes contact with the center pole on the USB battery connector.
But there should be no reason why the ecigs from Wayne's site would in themselves be different from any other 801 or 901 in that regard.
That is, you didn't say you bought one of the newer style 901s; if so, I'm afraid I don't know about it's compatibility with regular 901 parts.