I'll try to explain it a little better. Look at it as 10 seperate races. Driver is awarded points for each hill according to where they finish. 1st-50,2nd-46,3rd-43,4th42 and 1 point down for each place down.
Example in this race:
First hill:
Tim Cameron 50
Shawn Tolson 46
Peter Basler 43
Steven Woolsey 42
Peter Ruttan 41
Nick Cooper 40
Bobby Tanner 39
Jamie Whitaker 38
Luke Wilson 37
Jody Childers 36
Second hill:
Shawn Tolson 50
Clint Evans 46
Peter Ruttan 43
Ryan Bramhall 42
Jamie Whitaker 41
Peter Basler 40
Bobby Tanner 39
Tim Cameron 38
Robert Bounds 37
Luke Wilson 36
In this race Timmie won the first hill and placed 8th on the second hill because only 10 climbed the hill.