if the masts and sails are of the same brand -then this issue is very unusual
unless masts and sails are from different years - as suggested
like MauiSails who went from hard top to CC in 2014
i have a SW Retro
Bruce Peterson suggested that a my hard top mast would be better than my NP flex top
really did NOT like that setup with the MauiSails 490 mast
tried the flextop and it was a little better
busted the bottom of my NP and bought older NP CC mast
that was the best combo on that SW Retro
for my HSM Speedfreak I use the NP CC bottom and NP flexy top
joewindsurfer.blogspot.com/2008/07/masts.html
the HH on the sail is a repair and has nothing to do with Helly Hanson
and with a pic like that - there will be no comments about lawn care ...