Opening and closing the Charts Library changes the size of the chart window. This regularly results in the charts moving around to fit in the reduced window size. For example three columns of charts to two columns of charts.

A 'snap to grid' or a 'chart lock' function where the charts never move unless dragged on purpose would be great.

You can probably tell, I like my charts in a particular order. Having them in my chosen order helps quickly see where each of my athletes' are in their training and makes it less time consuming when reviewing multiple athletes each week.