When initially loaded, RadTrackBar's thumb is not aligned properly.

Wrong painting in waiting bar in Dash style

When the size of RadTrackBar is set to less than 90 pixels (69 in this case) the last tree thumbs steps remain hidden (invisible). 

To reproduce: Set the track bar value to 10 and increment by one every lets see button click. When the values reaches 8, the thumb is already out of the bounds of the track bar.

The thumb is not updating when the value is changed in design time.