[YodasLuke]

I always thought that for a right handed player if the lie angle is too upright the ball will go left, and if too flat it will go right. Am I missing something?

I'm sure both of you are right in the way in which you're looking at the problem. I think what he was trying to say was that if you come in steeply with the hands compared to club, it goes right and vice versa. The more simple explanation is that: toe down impact = right and toe up impact = left. It's because of the loft of the club that it's more right or left with the more lofted clubs.
The only true way to find the appropriate lie angle is a dynamic test (hitting the ball off a lie board). The fingers to the floor test is terrible.