meshes being generated at target instead of at 0x0y0z I'm having trouble. I'd like to have a cube pop in at 0x0y0z instead of popping in at the left click's target's location, it wasn't always like this. Can you help?
Shift S

Snap Cursor to Center.
Then add Cube 

or

Shift S

Snap Cursor to Center.

Click on Cube

Shift S

Snap Selection to Cursor.


Do not be concerned with [it wasn't always like this.] 
Be ready for new ideas in Blender