Add secondary x-axis but don't sort by it

[#1]

This is going to be hard to explain by text so please see images below. Basically I'd like to have grouped by category below the main x-axis without it messing up the sort order. Whilst it's possible to have category "above" the main x-axis, this doesn't look nice and causes category grid lines to be drawn every entry instead of only when it changes.

[#2 · Accepted solution]

So You could readd the desired order below that even, then turn off the third axis. 

Names default to here(1);
dt = New Table( "Test",
	Add Rows( 6 ),
	New Column( "Desired Order",
		Numeric,
		"Nominal",
		Format( "Best", 12 ),
		Set Values( [1, 2, 3, 4, 5, 6] )
	),
	New Column( "Category",
		Character,
		"Nominal",
		Set Values( {"A", "B", "B", "A", "A", "B"} )
	),
	New Column( "Data",
		Numeric,
		"Continuous",
		Format( "Best", 12 ),
		Set Values( [1, 2, 3, 4, 5, 6] )
	)
);

dt = Graph Builder(
	Variables(
		X( :Desired Order ),
		X( :Category, Position( 1 ) ),
		X( :Desired Order, Position( 1 ) ),
		Y( :Data ),
		Color( :Category )
	),
	Elements( Points( X( 1 ), X( 2 ), Y, Legend( 107 ) ) ),
	SendToReport(
		Dispatch(
			{},
			"Desired Order",
			ScaleBox,
			{Label Row(
				3,
				{Automatic Tick Marks( 0 ), Show Major Labels( 0 ),
				Show Major Ticks( 0 )}
			)}
		),
		Dispatch( {}, "400", LegendBox, {Set Title( "" )} )
	)
);

Hope that works for you.