I have had the same problem. I've been thinking of using a spade to banana adaptor. However I sure hate having to pass the signal through it. For now I'm bending the spades but I have headed for the tool box to get my cutters more than once. Just can't bring myself to nipping a factory spade. I sure will be happy when they come out with industry standards.
Speaker Posts
In my 12 years as an audiophile audiogear lover, I have gone through over a dozen speakers. Not one has binding posts that fit well with speaker cables spades!! Ive spent nervous hours trying to expand and bend speaker spades so that they make a nice fit into the binding post. I only hope that one sunny day comes where speaker designers and speaker cable makers have a world summit to get it right once and for all.