I’m planning on using the CODAP sample roller coaster dataset in a workshop, so I was demonstrating it to some people yesterday – it was as I remembered it, with state at a different level and the categorical variable for age range: oldest, recent, newest.  Today when I looked at the dataset, the “age range” variable has been changed and is at a higher level.  Now, the values are “1:oldest,” “2:recent” and “3:newest.”  I want to make sure that I didn’t make that change inadvertently (I certainly didn’t change those values — and I don’t think I saved the document, except locally).  And I’m curious how anyone could change it, since I imagine the sample datasets aren’t over-writable.  Any idea what happened?