Unkown duplication bug.
Okay, for some strange reason, In the Mixer, there are more instruments than what I have listed. For instance, in the score I'm currently working on, I have two Violincello instruments within the score. However, in the mixer, there are FOUR. Two of which when I edit, don't do anything they're just there. the same thing happened with a different score, but with trumpets. I don't know how to fix it either, I've tried reloading the program but that didn't work. Would really like to know what causes this so that I may avoid having confusion when I make more scores in the future.