Gah! Really frustrating bug with changing preferred-file!

"Make Selected Preference" makes the file focus random. I have two files. I want to switch which one is the preferred, and then check the other one. I use the keyboard shortcut to do so, and all of a sudden, the blue-line-selected file jumps down about 10. I have to reclick on the file I just changed preferences on in order to select it again.
Check out the before http://dl.getdropbox.com/u/45431/befo...
vs
after http://dl.getdropbox.com/u/45431/afte...

The files have been switched correctly, but the file selected is now some random file down the page. Ain't supposed to be like that.