Hi Ben,
The settings in the file were based on Frizz. Which means the amount of Frizz added from the root is the key here. Based on the Curve, you can add or more or less along the way.
The key here: along the way, which means that the tip position of the Hair, is the result of all that happens along the way. It is an additive.
What you expect is an effect that is only given to fractions of the Hair, if the curve says so.
Frizz works additive. In other words, if one would explore a single Hair in ten parts, the middle parts would have the most Frizz, parts 4 and 5 in this case. However, part six with less Frizz would start at the end of part 5. and so one. Whatever position part 9 provides on its end, will be the starting point of part ten with nearly to zero Frizz on its start.
Typically the Clump would do that, but since the Roots are that close, it needs to be stretched out first, and then it loses its symmetry.
My tip, go with Wave, which works like in the file below.
https://www.amazon.com/clouddrive/share/ZgcYeNoqZ95FYLjSYyGkAu0JayzJeRrPneZc2Q1IsSG
Tricky, but possible.
To comb it in shape is perhaps too much to ask, the same complicated level with directing it via XPresso.
Perhaps use Spline Guides. Let me know if you need an example.
All the best
