There is no normal. Machines do exactly what you tell them to do.
What you need to do is set your 0,0 position on your machine to the same position relative to your stock that it is in your CAM program.
On my router, 0,0 is the lower left corner of the table.
In AutoCAD, I have my table drawn with the lower left corner at 0,0.
I draw my parts exactly where I'll be placing them on the table, and never change my origin. (Well, almost never, but that just complicates things. )