I had this same problem of about the same amount of it being off.
Get the machine at the CS marks. Do a SETZ so that is home zero. Now power the machine off WITHOUT doing the 4-home axis 2- home for power off.. Just pull the power.
Upon boot up you get the machine was not power down in idle position this and that.. Hit the start button and it CS to the zero you are currently sitting and if your marks are right, it is the correct CS zero now for the ATC to be happy.
With doing the CS with it .080 off, it just kept going right back to the wrong place, but doing that power pull at the CS I wanted it worked fine.