I've received your level, but can not confirm your problem. The clip ranges of both views can be set independently. Additionally, your level was very simple and if there were such a bug, it would have happened in other games too, and other people would have noticed it.

Therefore, if you're sure of your observation the bug is elsewhere. It's not a likely video driver bug, but that seems to be the only remaining possibility. Update your video driver. What driver version were you using?