Trouble with listener updating position?

[GiudiceLab]

I've attached a sample script that seems to replicate the problem. I used the 'quack.wav' file because I assumed you would be able to access it, but if you need a copy of the sound file, let me know.

What I am hoping you will notice is that if you walk toward an object (in this case a soccerball), the sound functions seem to work fine--for instance, the sound gets louder as you approach the object, and quieter when you move away. But if you then stop and rotate toward the other objects, the sound spatialization seems inaccurate until you translate the viewpoint. So you might move several meters, but still have an object sound as though it is right next to you, or the sound might only come from one side even when the object is directly in front of you.

I'm hoping it is something simple that I've overlooked. Thanks.