I wouldn't say that this is normal. But, I could see why it would be happening. If you haven't already, it would be worth it to run through and reset the Graphics Configuration Registry by opening the Display Setup Tool and clicking the Having Problems button. Then, restart the computer and reconfigure your screens within Windows and MediaShout (you'll want to do this when you are physically there at the computer). I have seen in the past where that will the configuration stay more consistent.
Let me know how that goes if you decide to try that.