Josh, thanks for the reply and i passed it on to the VirtualEarth forum.
But i noticed that your SurfaceVEPushPins sometimes appear on placed they dont need to be.
Like it placed points on the UK, and when i look zoomed in on Finland the UK suddenly appear when i reach the MaxAltitude of some pinpoints.
After some research i noticed that some pushpins with MaxAltitude (child pushpins) apear on screen when the MaxAltitude is reach.
No problem, exactly what i need. But they apear frequently to at other places, like a total different country. (not on the other side of the globe.
(Like the UK and Finland).
So i think there is going something wrong with rendering the PushPins triggert by Max and MinAltitude.