arbitrary point on xy for Evaluate Surface

hi everyone,

i am a newbie to grasshopper who is enjoying sometime of his summer exploring the grasshopper. i am working on a waffle structure. i succeeded on making the structure and i am working on orienting and tagging the patron. i am using the Evaluate Surface Compound but i am having a problem with the xy point orientation on the sections i made. they simply do not share the same orientation as shown the photo below.

any help would me appreciated.

p.s: i am using the WIP on Mac.

thanks,

Zadig