That seems rather odd. Ive had more than 6 Kindles and devices, way more, and if that rule was true then I would not have been able to DLed purchaed books to all of them. Over time I purchased many new Kindles/devices and at some point I passed 6. Many of those Kindles/devices are now sold and no longer registered to me. I've never encountered that issue, so perhaps there is something else going on which you need to contact Amazon about.
Last edited by jswinden; 11-15-2012 at 02:46 PM.