Hi Warren,
Yes, you can prevent this easily by using the Push Away From Surface button in the Edit Guides operator with a very low value or you can use the Push Away From Suface operator on top of Edit Guides and groom the guides as you please.
More info in our documentation:
https://ephere.com/plugins/autodesk/maya/ornatrix/docs/1/Push_Away_From_Surface.html
https://ephere.com/plugins/autodesk/maya/ornatrix/docs/1/
Jeordanis Figuereo (Product Designer. EPHERE Inc.)