V 9.11. Never had this happen before. I've been putting in different measurements for side seam to see how the changes affect the pattern. It's not changing. I can change other measurements but not the side seam. I've tried saving the changes but I can see when I press draft that it isn't changing. Please help.

I just want to clarify: how did you "put in different measurements for side seam"? Did you mean the side length i.e. from underarm to waist? Also, can you please send a problem report (open Dress Shop, load the measurements set and the pattern in question, then "Help -> Problem Report") ?

In any case, I have witnessed the same behavior in some cases. Dress Shop's drafting engine is a mystery to me . Occasionally, there are unexpected behaviors but they can usually be worked around.