Excel 2007 :: Primary Category Axis Title Rotates With Rotated Value Axis Titles

I've put together code to construct a chart

It all works fine but I've noticed an odd quirk which I can't explain nor can I seem to fix. Here's the (reduced) code :

Code:
Dim appExcel As Object ' Excel Application
Dim chtPareto As Object ' Chart
Set appExcel = CreateObject("Excel.Application")
Set chtPareto = appExcel.Charts.Add
With chtPareto
' Primary category axis

[code]....

The category (x) axis title should be horizontal, whereas the value (y) axis title should be rotated. Stepping through the code, when I .SetElement for the category axis title, it appears horizontal as planned. However, as soon as I .SetElement for the rotated value axis title, the category axis title also rotates.