I have done the step from my previous question at How to use the coordinate system in arcgis 10? and it looks great when the layer did match all together.
It almost the same problem. The problem is, why the layer that I add into table of contents did not move into any single place that I edit in the properties?
It only stick into one place only. I have try many ways to change the location of the layer added.

The red point is my layer added after I add the Bing Maps from Arcgis 10. Then I click the right click button < properties < Coordinate system.



I'm still learning the basics.