Question - How can I 'pin' shared calendars in the order i like?

I have access to multiple shared calendars in MS365. I would like to have them in the order I like (most frequently used on top and so on). I used to drag them into order which 'pinned' them - they didn't move after a restart. Now, however, the calendars pop back to default alphabetical mode every couple of hours. I'm wasting time dragging them to place again, only for them to reset after a while. 

How can I stop them going back to default order? Is there a solution that doesn't require me to get a PhD in IT services and programming, please?

Thanks