Hello Matt,
I downloaded your program and saw the problem with the x scale. However, when I took turned off Autoscale X axis and reset the scale layout by right-clicking ->Advanced -> Reset Scale Layout, everything seemed to look right again. I ran the program over and over to see if the problem came back but I did not see the behavior again. I also tried this in both versions 7 and 7.1 to see if it had something to do with the different versions. The resetting of the scale layout seemed to work in both versions. I also set the new layout as the default and saved the program. When I reopened the program, the origin was in the correct location. So, I am unable to see the same behavior you are. If you can think of another way to demonstrate this behavior to me let me know and I will take a look at it.
Thanks,
Caroline
National Instruments
Thanks,
Caroline Tipton
Data Management Product Manager
National Instruments