When I insert drawings of the formations, I often get (in the large white space which contains the part of the sequence which has already been "treated") a drawing in the final part of the sequence which is clearly wrong. I often get a drawing of some kind of ring formation even though it should clearly be a "rectangular" formation. But when I go to the "Edit"-screen and click "Save", the problem is solved - the drawing of the ring formation is changed to a correct drawing. Do you have any explanation of this phenomenon?