Objects changed position (without me making any changes)

Hi Adobe,

I just got back from vacation and discovered that my website now looks really, really strange: Bewersdorf Laboratory

As you can see in the left image below, many of the animated objects are not were they are supposed to be.

... These objects all used to be hidden behind the big black circle in the middle of the image, as shown in the right image below.

I haven't made any changes to the website since the beginning of July (2014), so I am guessing something changed in Chrome (the browser I am using).

Is there anything I can do to fix this, without redoing the whole animation?

Thanks,

Emil