Because scale have an effect on define position on map. When the scale change the object on map then
change and when query old location with new scale. The object on map will show new position.
When we zoom on the map, sever generates new map for shown. We can observe in
.tmp folder. Although, img.x, img.y of step 1.3 and 1.6 is 240, 260 too, but attributes is different.
Moreover, imgext changes. Summing it up, img.x, img.y of step 1.3 and 1.6 is different position
on the map because zoom get new image that get new imgext. New Imgext of new image is
calculated new img.x and img.y.