Mouth moving without audio input

I created all my mouth movements and imported successfully. When testing the webcam and mic in STREAM mode it's picking up my mouth movements but they aren't holding on the shape and the mouth continues to move for a few seconds after i finish talking. 

For example if i hold an "oooooooohhh" sound and mouth position it jumps around wildly flickering to a bunch of different mouth positions and only displaying the Oh for 1 frame.