#1
i have changed my high e string about 4 times i the past month.
ive also noticed it breaks at the bridge every single time. (it breaks when i bend)

what is the problem and is it common and how can i fix it?
#2
The high e is extremely thin so that could explain it but i dont think that's the problem. Sometimes, when the string snaps in the same place every time, there could be a rough edge or a sharp bit on the saddle. Just check to see thats its smooth, if you're still not happy take it to your local guitar store and they'll help you out.
#3
ummm probably sounds like a sharp saddle. just go over that saddle spot with some wet/dry sandpaper and it shouldnt happen again