Zoom Error

While editing a piece that has multiple staffs on it, I zoom it to 150 to make it easier to see. I then save it, still zoomed at 150.
When I open it, it's back at 100%, but the zoom meter says 150. I change it back to 100, nothing changes. Then back to 150, and it goes back to 150.
Bug?

imazi643
Windows 7
1.1