Whac-A-Mole

I am playing Whac-a-Mole with the 'undo' button in Light Pollution Correction. Although I have not yet learned the art of light pollution correction, I find I use the undo button, sometimes a lot, to remove the latest box. Doing that changes the variable length text above the buttons which then moves the buttons. So sadly, although not moving the mouse, the cursor is now over 'cancel', canceling all previous work.

Chasing buttons does not make sense to me. Obviously losing work doesn't either. I understand variable length text displays, but if they move the interface controls, that seems bad. 

I also miss an ability to select previous boxes, so I may remove boxes other than the last box. I don't fully understand the intent of box placement or how they interact. I hope practice will help. Perhaps a simplified explanation of what the calculations are trying to do that I have not read yet will help.

Yes I am just starting out. Some picture processing is well beyond my understanding. Many of the terms used in astronomy and astrophotography are still unfamiliar. I hope to learn more. 

To me however, moving controls, reference tabs, and variable interfaces, interfere with usability. Hopefully not having to chase things makes sense and will be an upcoming update.

Thanks