Hitting submit multiple times duplicates the instructions at the top left of the chart

Thanks so much Fati! Fixed. It still resets the instructions when you click "Submit", but at least it doesn't get worse.

Shan’s tip: “can you do the clipping of the heads at the extent only on the ‘rendering’ step, so that if you drag to the edge, don’t release mouse, and continue dragging back into safe space, the orientations are not destroyed?”