This happened to me one time. It turned out I had instances in my scene. Example: You duplicated an instance of half your character. Try mirroring and merging.

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www.stevenegan-cgi.com

"Your weapons are no match for ours! People of Mars, surrender!"
"Um, this isn't Mars. This is Earth."
"Earth? Earth-with-nuclear-weapons Earth?"
"Yes."
[long pause] "Friend!!"