Ok.. I believe I know what the issue is. It seems to be one of the timing of creating the Scrollbars.
With a small sample as in the example, the grid is created quickly and everything works fine. However, with a larger dataset it takes may take a second of two and that means the Scrollbar creation process gets messed up.
I was able to check this by putting the DBAdvGrid1.Reload on a button click event. And then my AddScroolBarsToGrid(DBAdvGrid1) function on another button click event.
As such all I ought to need do is place my function call after all rows have been added to the grid.
Can you tell me what DBAdvGrid event is fired after all rows have been added to the grid?