Min first page bid dance

One day "min bid for first page" is .40 so I up bid to .40 (getting no impressions at all with .2 bid). Next day 'min first page bid' is now .5, but I'm getting hits out the wazzo (and result shows up on first page). Google gives my landing page a rank of 3, but Adwords still lists it as "poor"

Looks like the bid prices are still driven by Google's profit margins.