Solution for Reflection Issue :
Very simple lah. For flash photography, just shift your position. Do not point your camera w/flahs right infront of the glass. Take photo of your subject at an angle. See below chart got from online.
Read more from :
http://www.howstuffworks.com/light2.htm
For blur photos, turn to higher shutter speed. Turn on all lights or shoot with flash (remember above pointers) Good luck.