Hi,
My name is Jonesy and I have been working with Zbrush on and off through my university career. No that it is over I am really trying to improve my Zbrush skills and learn new things every day. I was following along with a tutorial and using the curvesurface brush and other curve brushes to make straps and the like for my character. I began running into trouble when I tried to edit the curve. It would seem that while I pull on the points of the curve to adjust it, the two end points are tugged slightly out of place with each movement. I also noticed that if I just click on a point without moving it, the entire curve begins to relax. Is this a function I can turn off or modify somehow? It is very frustrating 
Thanks for the help in advance,
Cheers,
A young Canadian 3d Artist