Started out really good, I set up 4x3 panels. Then I wanted to drag a panel and for some reason I managed to make it disappear. Then I wanted to add the lost website back again and now it tries to override one of the existing ones (the purple confirmation frame appears on another panel). But I can't add it any more! I assume it exists already but even when I set everything so that I can see many panels (6x6), it doesn't exist anywhere. Something doesn't work right.

Tip: DO NOT USE DRAG AND DROP BECAUSE YOU MIGHT LOSE ALL YOUR PRIOR WORK.