I'm trying to add my own template to the thumb for a XamNumericSlider, and have used the pattern described in the xamSlider->Thumb Styling sample in the Feature Browser. However, there are some issues:

1. The Feature Browser sample uses a XamNumericRangeSlider, and if I replace this with a XamNumericSlider I get a compile error like "Cannot add content to object of type 'Infragistics.Controls.Editors.XamNumericSlider' ". To solve this error I have to make my own subclass of XamNumericSlider and set its ContentProperty value to "Thumb". Why is XamNumericRangeSlider  and XamNumericSlider different in this case ?

2. When using my thumb template the slider's track fill starts at a value of half the thumb width and also extends beyond the slider's max value with the same amount. I get the same effect if I use the original XamNumericRangeSlider sample. How can I fix this ?