running_scared - 9:24 am on Jun 30, 2004 (gmt 0)

I know this may seem slightly counter-intuitive, but CTR can easily change from second to second (and in fact, by definition it changes every single time the ads appears or is clicked on). In this context, it can literally happen that the CTR is sufficient to send the ad 'North' in one moment, and not in the next.

Seems like the settings need a bit of dampening them. Personally I find it really frustrating that it changes so much (especially when I have a client who wants to be top right, not top top)