Multiple tor circuits and exit nodes used to load single Website
The new release of Tor Bowser Bundle (4.5.1) seems to be creating multiple circuits 4+ and when loading a website uses multiple exitnodes for the same webpage. Previous behaviour it would use a single circuit/exitnode for a webpage. (Using Vidalia to view circuits)
Experimenting by editing the torrc to restrict to just one exit node exhibited the same behaviour where multiple circuits are created and multiple paths with same entry node (as expected) and exit node (as forced) but different middle relay to load a website/webpage.