Exported video NOT THE SAME as the one I playback in the timeline

I have an animation of a character with arms attached to the shoulders that plays nicely in the timeline when I hit the playback button. However, in the resulting video after I export with alpha via AME, the arms of the puppet are detached and floating above the body. What you see when you playback your animation in the timeline should be what you get after exporting. This is very weird. I'm on a tight deadline and I would appreciate any help on this. You can see a video of the issue here: 
https://drive.google.com/file/d/1xSfO5V14fUhaW4WJxRwxYoT3CY6PyWBd/view?usp=sharing