The expander plug I mentioned should be in the sizing die. It would be keeping the decapping pin in place, as well. When the case is pushed into the die, the decapping pin knocks out the old primer and the sizer squeezes the neck down to undersize. When you pull the case out of the die the expander plug pushes the neck out to size.
The 32 Win SPl seating die will work with the 32-40, but the 32 Win Spl sizer die is all wrong. See if Lee will fix that for ya and get you a Lee Factory Crimp die. You may not find one for the 32=40, but the 32 Win SPl should work as they are the same nominal length and diamter. Try before you buy. Shoot me a pm with you address. I'll be back home in a week and will loan you mine. They can be pricey, though not always.