Steps to reproduce it: (it's not always working..)
1. Open statistics window
2. Start selecting text from the first char (first table)
3. Continue selecting till the end of view and let the view scroll for a while. Hold the lef mouse button
4. Now start moving mouse cursor up (in opposite way) deselecting one or two tables. Release LMB
5. Start selecting "free tables"
As I said it is not always working, you must try different ways of selecting text. I'm sure you get double selection quickly.
It seems that is some kind of refresh bug, because if I minimize the statistic window and maximize it again only one selection remains.
Well, while playing with it, I have found it to crash on "Copy" as well
So both are hopefuly fixed now, but the fix is somewhat ugly, because it selects whole tables only (anything else is too complicated for CtrlLib facility).