I did too order the 'new' 10-port Anker (
http://www.amazon.com/Release-Anker%C2%AE-Uspeed-Charging-Adapter/dp/B005NGQWL2), which is really 9+1. It ships with a 5A PS though which is good, and there were a couple postings stating that you can use all 10 ports.
I have one of the older 10-port Ankers today, though because the older PS was only 4A it get's problematic to use more than 8 Erupters on it.
We shall see, it should arrive sometime today.
If you purchased directly from anker you can use all 10 ports and burn the thing out and request a RMA for it, I've used the AiTech and Orico with all 10 ports and no problems as of yet.
The new anker I've only used 9 of the ports on so.