Hello Greg,
Unfortunately, as far as I know, there is not way to define a starting point for you BOM using the Style 2 Material List file. The only options I can think of to control a bit the location is to use Option Switches 10-13 for Drawing Margin, and Option Switch 25 for switching it's position from right to left.
To have better control for location (using X-Y coordinates), I would suggest you to use Style 3 Material Definition File.
Regards,
Justinas