Hi,

To know for sure I would have to look into your scene. But if you can follow this it should work as you expect:

1. Add a distribution map. Reducing the hair distribution area with a distribution map(Multiplier Map) will optimize the hair interpolation, making the hair follow the guides better.

2. Use the default hair interpolation settings in Hair from Guides. The default settings work better for human hair. 

3. If this haircut have a parting, use the parting tools(Hair from Guides) to define a parting plane. Defining the parting will improve hair interpolation. 

Jeordanis Figuereo (Product Designer. EPHERE Inc.)