Lists: Administrator edits not showing up in "Last Updated" detail

[George]

Look at this list:

http://openlibrary.org/people/george08/lists/OL1180L/My_2011_Acquisitions

You'll see the "Infinite City" title listed on there, but without a Last Updated date. It doesn't show up at all on the Activity view.

I suspect this might be due to the last edit being done by "Administrator". I added a new contributor role ("Writer").

It would be better if modifications to config edition were registered to the person who made the update anyway (easier for me to track down who did what, and which editions they affected), but in the meantime, Administrator edits need to show up on a List.