If I add another AuroRa package will all 10 dimmers work together as one system?
Yes, you simply need to bridge the two systems together. Once bridged, all 10 dimmers will come on to full bright (100%) when you press the All On button on any remote and all 10 dimmers will turn off when you press the All Off button on any remote. Pressing the Favorite button on the Wireless Controllers will turn all 10 dimmers on to their locally adjusted slider levels.