If you're leaving anyway could you post the scripts here anyway so I can double check them, in the brief view of them in the video I spotted a few things that didn't quite look right.
There are some known issues with the built in AI where they can stall during path finding , I don't think Lee has found the cause yet, but that doesn't appear to be what you are seeing as they are moving but not animating correctly, it is more likely a subtle script error.
Been there, done that, got all the T-Shirts!