[2.4.1] Individual bits of columns sometimes finding themselves out of their category on the PSD

Every now and then I've noticed that sometimes a specific column will separate itself from its category on the PSD.  I'm sorry to say that I don't know exactly what I do to separate it, but I've seen it happen once or twice in the last few days.  Moving the column category around usually reunites the columns and everything is happy again.

Today the issue popped up on an RVI.

Here's a picture that's more descriptive than I can be: http://i.imgur.com/0a5h3rL.jpg

 

Notice I said "usually."  This time when I went back to the RVI and moved the columns around to sort everything out, the PSD got really upset: http://i.imgur.com/TlIYR0k.jpg

 

I'm sorry to say that I can't replicate the issue, so I don't know what happened to confuse the PSD like this, but I thought it was worth telling y'all about.

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