Closing any app results in downshift of the windows that were sized using shiftit commands

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Use any application's two windows (ex. adobe reader but two documents).
2. Use shiftit to position them next to each other using 50% of the screen. 
(ex. use "combination+left arrow" to throw one of the windows to left and 
"combination+right arrow" to throw the other window to the right).
3. Now open any other different app, for ex. chrome and then quit chrome. The 
adobe reader windows will shift  ~10% down.

What is the expected output? What do you see instead?
Expected output is to have the resized windows stay the way they are. What I 
see instead is that they shift down when I "QUIT" not 'close' another different 
application.

What version of the product are you using?
Version 1.6

On what operating system( 10.5
or 10.6)?
10.9.3

Are you using a dual monitor?
No

Attach screenshots if it is a problem with the window position and size.

Please attach logs if you notice any crashes.
Surprisingly, there aren't any logs being recorded.

Please provide any additional information below.

Original issue reported on code.google.com by anarjo...@gmail.com on 14 Jun 2014 at 7:53