Hi,
It happens quite often to me where I would Mirror a surface long a plane and then when i knit the two surfaces the mirror command creates a copy of the initial surface.
I then have to do Delete/Keep Body on the duplicate (or it may be the original...I don't know). Do you guys know why that happens? See attached visuals.
Thank you.
It shouldn't happen if you have the Knit surfaces checked when you do the mirror.