Why Alivepdf generate double table header?

I'm attempting to create a pdf table on my flex application using AlivePdf:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
                xmlns:mh="mh.components.*"
                layout="absolute" width="500" height="500">



<mx:Script>
    <![CDATA[
        import mx.collections.ArrayCollection;

        import org.alivepdf.colors.RGBColor;
        import org.alivepdf.display.Display;
        import org.alivepdf.drawing.Caps;
        import org.alivepdf.fonts.FontFamily;
        import org.alivepdf.fonts.Style;
        import org.alivepdf.grid.Grid;
        import org.alivepdf.images.ImageFormat;
        import org.alivepdf.layout.Orientation;
        import org.alivepdf.layout.Resize;
        import org.alivepdf.layout.Size;
        import org.alivepdf.layout.Unit;
        import org.alivepdf.pages.Page;
        import org.alivepdf.pdf.PDF;
        import org.alivepdf.saving.Method;
        import org.alivepdf.visibility.Visibility;

        import org.alivepdf.grid.*;





        private var myPDF:PDF;


        //print chart in pdf format
        protected function savePDF(e:MouseEvent):void
        {
            var myPDF:PDF = new PDF ( Orientation.PORTRAIT, Unit.MM);
            myPDF.setDisplayMode(Display.FULL_PAGE);
            myPDF.addPage();



            myPDF.setXY( 10, 70);
            myPDF.textStyle ( new RGBColor ( 0x000000 ) );

            var dp:ArrayCollection = new ArrayCollection();
            dp.addItem( { firstName : "Bob Geldorf akjaskaj skajs as kajs kaj k dklfj sdkfjl sdkjf ksdj fkjs dkfj ksdj ", lastName : "Groove", city : "Paris" } );
            dp.addItem( { firstName : "Bob", lastName : "Wise", city : "Paris" } );
            dp.addItem( { firstName : "Bob", lastName : "Wise", city : "Paris" } );
            dp.addItem( { firstName : "Bob", lastName : "Wise", city : "Paris" } );


            var grid:Grid = new Grid ( dp.toArray(), 200, 100, new RGBColor (0x00DEFF));


            myPDF.addGrid( grid, 0, 0, true );
            myPDF.save( Method.REMOTE, "coldfusion/pdf.cfm", "inline", "test.pdf" );;
        }



    ]]>
</mx:Script>    

<mx:VBox width="100%" height="100%">


    <mx:HBox width="100%" backgroundColor="#FFFFFF">
        <mx:Spacer width="100%"/>

        <mx:Button horizontalCenter="0" label="Save to PDF" height="22"  click="savePDF(event)"  id="savePDFBtn" toolTip="SAVE TO PDF"/>

    </mx:HBox>
</mx:VBox>

The strange thing is that the script create a table with double header and I don't know why. You can see the pdf generated at this link: https://docs.google.com/viewer?url=prestitiinpdap.biz/pdf/myPDF.pdf

Which version of the library do you use? I have tried to compile your code with the current version 0.1.5RC and the compiler could not find some classes.

After correction of the class paths I have found that the "new Grid(...)" constructor needs 7 parameters (in your case only 4).

Another issue is "width" in "Grid(...)". I don't know, what the developers wanted to express with it. I could get I normal view only with 60.

I have got the following PDF after all:

Here is my code:

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
           xmlns:s="library://ns.adobe.com/flex/spark" 
           xmlns:mx="library://ns.adobe.com/flex/mx" width="500" height="500">
<fx:Script>
    <![CDATA[
    import mx.collections.ArrayCollection;
    import org.alivepdf.colors.RGBColor;
    import org.alivepdf.data.Grid;
    import org.alivepdf.display.Display;
    import org.alivepdf.drawing.Caps;
    import org.alivepdf.fonts.FontFamily;
    import org.alivepdf.fonts.Style;
    import org.alivepdf.images.ImageFormat;
    import org.alivepdf.layout.Orientation;
    import org.alivepdf.layout.Resize;
    import org.alivepdf.layout.Size;
    import org.alivepdf.layout.Unit;
    import org.alivepdf.pages.Page;
    import org.alivepdf.pdf.PDF;
    import org.alivepdf.saving.Method;
    import org.alivepdf.visibility.Visibility;
    import org.alivepdf.layout.*;
    private var myPDF:PDF;

    protected function savePDF(e:MouseEvent):void
    {
        var myPDF:PDF = new PDF( Orientation.PORTRAIT, Unit.MM); 
        myPDF.setDisplayMode( Display.FULL_PAGE, Layout.SINGLE_PAGE );

        var newPage:Page = new Page ( Orientation.PORTRAIT, Unit.MM);
        myPDF.addPage(newPage);

        myPDF.textStyle ( new RGBColor ( 0x000000 ) );

        var dp:ArrayCollection = new ArrayCollection();
        dp.addItem( { firstName : "Bob Geldorf akjaskaj skajs as kajs kaj k dklfj sdkfjl sdkjf ksdj fkjs dkfj ksdj ", lastName : "Groove", city : "Paris" } );
        dp.addItem( { firstName : "Bob", lastName : "Wise", city : "Paris" } );
        dp.addItem( { firstName : "Bob", lastName : "Wise", city : "Paris" } );
        dp.addItem( { firstName : "Bob", lastName : "Wise", city : "Paris" } );

        //var grid:Grid = new Grid ( dp.toArray(), 200, 100, new RGBColor (0x00DEFF));

        var grid:Grid = new Grid (dp.toArray(), 60, 100, new RGBColor(0x00DEFF), new RGBColor (0xFFFFFF), false, new RGBColor (0x000000));
        myPDF.addGrid( grid, 0, 0, true );

        //myPDF.save( Method.REMOTE, "coldfusion/pdf.cfm", "inline", "test.pdf" );

        var f:FileReference = new FileReference();
        var b:ByteArray = myPDF.save(Method.LOCAL);
        f.save(b, "test.pdf");
    }

    ]]>
</fx:Script>    

<mx:VBox width="100%" height="100%">
    <mx:HBox width="100%" backgroundColor="#FFFFFF">
        <mx:Spacer width="100%"/>
        <mx:Button horizontalCenter="0" label="Save to PDF" height="22"  click="savePDF(event)"  id="savePDFBtn" toolTip="SAVE TO PDF"/>
    </mx:HBox>
</mx:VBox>
</s:Application>

Try it, may be it will help you.