Regarding the orangeyness - you're probably familiar with the concept of white balance. If you were to manually set the white balance of your camera such that the colors on your computer rendered correctly (as they do in the photo), then retaining those settings, turn off the computer monitor, the entire scene would be orange. If you were to then manually reset the white balance such that the monitor-less scene rendered in a more-or-less pleasing manner, then (again retaining the settings) turn the monitor back on, the monitor should render a (incorrect) blazing blue, with the monitor bezel correctly silver and desktop correctly not orange.

Your brain is very very good at mixing these light sources so that you don't notice the difference through your eyes. Cameras aren't so good with mixed light spectrums. Your camera did its best to make the whites on the screen white, but could only let the colors in rest of the scene fall where they may, considering it's primary task (rendering the screen correctly).