I'd like to chime in with a few comments:
1. Turdon - based on your example, the person who outbid you would only win at $11, not $9. The situation you explained was modified during our update last November.
2. Slimboli - you are exactly correct. The priority is on the bid date/time regardless of whether you have autobid or not. However, the bid date/time for an auto-bidder is stamped at the time of the original bid.