I can reproduce what @mhotchin is seeing on build 743.
I have 2 machines, one with build 729 and the other I just downloaded an installed build 743. When I output the gcode from 729 I see 2 passes at each Z height as expected. When I use 743 I see 1 pass at each Z height followed by a second pass at each Z height.
@WillAdams - if you aren’t able to reproduce it, could it be an OS difference? I’m using Windows on both machines, are you by any chance a Mac user?
Here are the Z heights in the 743 generated file:
$ grep G1Z ~/users/Downloads/Turtle\ Rock.nc
G1Z-0.2500F50.0
G1Z-0.3750F50.0
G1Z-0.5000F50.0
G1Z-0.6000F50.0
G1Z-0.2500F50.0
G1Z-0.3750F50.0
G1Z-0.5000F50.0
G1Z-0.6000F50.0
G1Z-0.7350F50.0
and in the 729 file
$ grep G1Z c:/temp/test.nc
G1Z-0.2500F50.0
G1Z-0.2500F50.0
G1Z-0.3750F50.0
G1Z-0.3750F50.0
G1Z-0.5000F50.0
G1Z-0.5000F50.0
G1Z-0.6000F50.0
G1Z-0.6000F50.0
G1Z-0.7350F50.0