Screen.orientation does not match Input.deviceOrientation

I can get the screen orientation to report "Landscape Left" while the device orientation is "Landscape Right". The phone is actually rotated Right. I believe this is the root cause of WebCamTexture.videoRotationAngle returning incorrect values occasionally. Is there any logical reason why Screen Orientation would say Rotated Left, whereas the device is actually Rotated Right? If not, I will submit a bug report.