Hey, dlopezdemedrano! Actually, I've got a help from another forum. I was told to set the mesh envelope to 0 before duplicating it, and that worked.

But thank you very much for your reply,...

Hey, guys!

I'm trying to add a blend shape for a downloaded rig, but I get some points moving when they are not supposed to. I've checked the inputs order already.

Here's my screen recording:...