From Tut
https://blenderartists.org/forum/viewtopic.php?t=60894&postdays=0&postorder=asc&start=15#562772
I did the first petal as shown in the tut in Top view
by doing Extrude and rotate to get the first petal
But i ended up that the Z value changed each time i extruded
so i ended with kind of an helix petal which i’m certain was not supposed to happen
what went wrong with the method i used 
Tanks & Salutations
Can’t be certain but I had a similar problem the other day. Turned out the viewport wasn’t aligned. I thought I was looking at the top view but somewhere along the line the view had been rotated (with the middle mouse button) just enough to offset the extrude but not enough to notice. Thinking about it I should have seen the grid was missing. Corkscrewed the verts a little more everytime they were edited.:rolleyes: