I recently downloaded draftsight and all worked seemlessly until I tried to copy multiple lines. Everything appeared to be gone. Upon zooming way out I found my drawing. Since this time I have experienced this during mirror commands and drawing lines. For example, I will start a line by snapping to the end of a previous line. I want to snap to the end of another line but the autosnap box does not appear. If I roll my mouse wheel one click, the viewing window changes and I am viewing a completely different area of the model space. 

I am assuming that there is an issue with my zoom, where I can see my drawing and think that I am drawing in that relative space, but the actual zoom in the program is not caught up. 

Any help?