Hi,
This is happening because Ornatrix is designed to interpolate hair between all the guides, one guide can guide thousads of hairs. But if you want the hair to grown exactly where you have to guides you have several ways to do that:
1 - You can turn ON "Use Guide Facess" in HairFromGuides and increase Iteration value.
2 - You you a texture map as a distribution map in HairFromGuides to tell Ornatrix where you want the hair to grow.
3 - You can select only the polygons where you want the hair and then use the "Quick Hair" command.
4 - You can add an Edit Poly modifier to the plane and create a Material ID where you want the hair to grow from, then in HairFromGuides turn ON "Use Material ID" and select the material ID.
5 - You can add an Edit Poly modifier to the plane, select the polygons where you want the hair, go to HairFromGuides and turn ON "Use Sub-Selection"
More info in the documentation here: https://ephere.com/plugins/autodesk/max/ornatrix/docs/5/Hair_from_Guides_Modifier.html
Jeordanis Figuereo (Product Designer. EPHERE Inc.)
Ended up using the guide faces with 3 iterations!