This command sets the G54 offset to zero
$RST=* resets your controller to its GRBL defaults
By definition No offset should be set, the offset table should be clear and zeroed.
If you type $RST=* in your console window, (making sure the connection state is NOT busy) the controller will reset to defaults.
Then your homing location will become the true zero zero
The file is ent you is simple a square and a circle, i sent it so we can remove from the table user error inputs.