[Pharo-users] expanding Pharo window to left and Window positioning

Hi, what rules govern window positioning? I have a dual monitor setup and and sometimes extend the Pharo window over both of them; for some reason however World submorphs (all Windows) are locked to the left side, which is what I am dragging, so all the windows move to the secondary screen. If I expand the right side, then the windows don't move (but they are again on the wrong screen). Is it possible to change this behavior? I tried to change World listDirection but it had no effect. Thanks, Peter