Flow along a surface issue

Not sure what my issue is but when trying to flow along a surface i have unwrapped my target surface, used planer surf as my source covered this surface exactly with my pattern but when i flow back onto the target surface the pattern comes up short. i have tried with a plane box and the result is the same. anyone any ideas?
image

solved it, i shrunk my source surface

Good job! Yes, the control point structure is what is looked at for the flow rather than what you see as shaded.