From that time until now I've been very careful not to move those items when Swiffer-dusting them. Now that I'm in deep-cleaning mode, though, I wanted to give all those objects, plus the flat surfaces they sit upon, a thorough wash and wipe. That meant taking everything down.
I understand the theory of randomness, but I don't yet trust myself in the practice of it, so I photographed these two arrangements before dismantling them:
The photos were helpful when it was time to put everything back; however, since photos are only two-dimensional, I had a little trouble recreating the various depths at which Donna had placed the objects. Using the pictures as reference, I moved several items back and forth an inch or so at a time until I thought it looked right. There. I'm done.
It's a satisfying feeling to know that all these things have been situated so precisely at random.