On April 26th, about one month ago, we reported Google AdWords Glitch: Bid Tool Conflicts With Position Preference Tool. The problem was and still is that when you enable the Position Preference it disables the Bid Tool.
Cline posts a new thread at WebmasterWorld reminding Google that it is still a serious problem. Cline writes;
I *do* mind that a month goes by and that the problem is neither reported to users nor is it fixed. Once a problem like this is identified, an organization is ethically responsible for either quickly fixing it or explaining the problem to users it might affect. A simple notice on the Edit CPCs Tool would have sufficed.
Forum discussion at WebmasterWorld.