Very true! When I set up things, I make sure that the cross bit is close to one end of my warping line, exactly for this reason. It does help a lot - though I can also say from experience that if you do not take care of stacking the tablets neatly, they will still sit any odd way, and get quite jumbled. So having the cross close to the tablets does help a lot, but it's not a "Selbstläufer", as the Germans might say: they still don't sort themselves into a stack if you do not do the work...