There's a client side bug that doesn't allow snares to last more than 36 seconds or something like that. While I don't think snares should have partial resists as they're not classic, you have to realize that the max duration allowed for snare by the client calls for a different resist system for that type of spell.
I thought partials were removed?
http://www.project1999.org/forums/sh...80&postcount=1