Moving this discussion to the Photoshop General Discussion forum.
Allen Togwell wrote:
I have photoshop CS6. The eraser and brush tool is not working properly.
Try resetting each problem tool by right-clicking where indicated by the red arrow and picking "Reset Tool" (or "Reset All Tools" for every Photoshop tool).
On CS6 after I select the layer when I put my curser anywhere on the page it would automatically select the layer that I am touching
I guess you need to disable Auto-Select in Options bar when Move Tool is activated. Also, holding down Cmd/Ctrl key will temporarily invert that setting (although the checkbox status will not change).