Each dig or scan focuses the camera on that tile (within some tolerance). Maybe that's what you experienced?
To move the camera around without digging/scanning, you can click on tiles already dug (or even outside of the visible tiles). I added this behavior very late in the jam and I don't really like it. Dragging around the level with the mouse would have been much better, I think. But, alas, time was running out =)
Thanks for your feedback and playing!