To answer the following questions:
-We are using an Epson PowerLite 83+ projector.
-using VGA, not HDMI, with a wall box connector
-the sideways image is on BOTH the screen and the board
-using Windows 8
I have recently spoken to one of the tech people at our school board office, and she said the problem lies with the recent Windows 8 updates. She said that she has fielded quite a few of these problems recently, and the only solution she knew of was to remove the updates.