CategoryAxisNumberFormat and CategoryAxisDateFormat are not working in script.  Execute script below on Northwind and see results.

select top 50 * from orders
go
.setResultSettings 'Index=1,
    CategoryFields="[ShippedDate] ASC",
    SeriesFields="[Freight]",
    ShowChart=true,
    ShowToolbar=true,
    Paging=true,
    Split=300,
    Chart="{column,line}",
    RotX=324,
    RotY=0,
    RotZ=0,
    Zoom=43.0,
    ScaleData=true,
    ShowLegend=true,
    ShowGrid=true,
    Title="",
    TitleValue="",
    PieExplode=0.0,
    GroupSmallValues=true,
    SmallValuesThreshold=3.0,
    PieLabelDistance=3.0,
    PieShowLines=false,
    LineWidth=1.0,
    Width=24.0,
    Height=10.0,
    Depth=5.0,
    SeriesSpacing=1.0,
    CategorySpacing=1.0,
    Font="Arial Unicode MS-BOLD-10",
    TopColor="#EBF0F5",
    BottomColor="#D7DCF5",
    PanX=-4.000001,
    PanY=-3.427267E-7,
    Lighting=Default,
    View2D=true,
    StackedPercent=false,
    ShowValueAxis=true,
    ShowCategoryAxis=true,
    ShowSeriesAxis=true,
    ValueAxisNumberFormat=,
    CategoryAxisNumberFormat=#,##0,
    CategoryAxisDateFormat=MM-dd-yyyy,
    UseCategoryAxisRange=false,
    MergeAxis=false,
    SeriesAlias="default,Slope",
    SeriesFunction="Moving Average ( 0, 10 ) ",
    SeriesSubType=",",
    SeriesColumnType="Cube,Cube",
    SeriesMin="default,default",
    SeriesMax="default,default",
    SeriesColor="default,default",
    SeriesFunctionMetaData="true,true",
    LegendPosition=Top Right,
    LegendWidthType=Fit,
    LegendWidth=100,
    LegendHeightType=Fit,
    LegendHeight=160,
    ShowFixedCategoryCount=false,
    FixedCategoryCount=0'