Excel 2013 auto generated macro VBA code does not work when attempting to run the macro

[XcvrTester]

I am trying to create a very simple Excel macro in Office 2013. The macro should create a line chart with titles on the x and y axes. I go to the "Developer" tab and select "Record Macro". I create my chart and everything looks fine. When I view my auto-generated VBA code it looks like the following:

Sub SimplePlotExample()
    Range("A1:B11").Select
    ActiveSheet.Shapes.AddChart2(332, xlLineMarkers).Select
    ActiveChart.SetSourceData Source:=Range("Sheet1!$A$1:$B$11")
    ActiveChart.SetElement (msoElementPrimaryCategoryAxisTitleAdjacentToAxis)
    Selection.Caption = "This is my rows title"
    ActiveChart.SetElement (msoElementPrimaryValueAxisTitleAdjacentToAxis)
    Selection.Caption = "This is my y axis title"
    Range("A1").Select
End Sub

The problem is that when I try to run this macro, the y-axis title does not get created and instead the x-axis has the title intended for the y-axis. If I go into the VBA code directly, comment out the line "Selection.Caption = "This is my y axis title"" and manually replace it with the code as shown below everything works fine.

Sub SimplePlotExample()
    Range("A1:B11").Select
        ActiveSheet.Shapes.AddChart2(332, xlLineMarkers).Select
        ActiveChart.SetSourceData Source:=Range("Sheet1!$A$1:$B$11")
        ActiveChart.SetElement (msoElementPrimaryCategoryAxisTitleAdjacentToAxis)
        Selection.Caption = "This is my rows title"
        ActiveChart.SetElement (msoElementPrimaryValueAxisTitleAdjacentToAxis)
    '   Add the 2 lines of code below manually to my macro code
        ActiveChart.Axes(xlValue, xlPrimary).HasTitle = True
        ActiveChart.Axes(xlValue, xlPrimary).AxisTitle.Text = "This is my hand-edited y axis title"
    '    Selection.Caption = "This is my y axis title"   ### This is the auto-generated line commented out
        Range("A1").Select
    End Sub

My questions is.....Why does the "auto-generated" VBA code not work correctly? I am using Microsoft Office Professional Plus 2013.
Thanks!