Map Zoom problem

[routeconverter]

2. As I paged forward in the listing, to find the next point where some deletion was needed, the blue line that showed the track on the map sometimes was not there, even though the map itself moved.

I have observed that problem, too. And I guess that's why I've left a comment in the code: it's a side effect of the optimized rendering which reduces the number of positions on the map to improve the rendering speed. Actually the area covered by the track should be nine times that of the currently shown map clipping.