Multiple pathfinding makes objects shake

Hello!
I tried to achieve both movable pathfinding grid and working with multiple objects at once. I've managed to do the first half but i have a problem with second one. When object goes to the next cell along the path it doesn't go further but weirdly shakes along destination except if it moves towards positive x axis. I was following the great example by Erkabubben and in this one everything works well and smooth and i can't tell what's wrong with mine. Can somebody help me with that?
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I actually managed to do it - every object looks in the direction of corresponding active which moves to the next cell when touched by object

But sometimes objects start to go in random direction instead of going to the target
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