OK so, my boyfriend and I have been playing this game for the past 3 or so days, we have made it to Mexico and we have gotten the 'god of war' horse (the horse that appears as a mythical creature with fire on it) we have just finally after what feels like forever completed the grave yard in Sepulcro set by the Mother, it took us a good 5mins in the end to do, but we are having problems with a 'glitch' as such, we are playing xbox 360 (single player) and every so often when we are clearing a grave yard or clearing / saving a town, zombies with no heads and/or arms appear and then the town safety wont go up and the mission will become never ending and we just end up with endless amounts of zombies with no heads and we have to quite and start the mission over. this is becoming really annoying after about 9 hours and 30 mins of playing and this happening every 2nd or 3rd town we try to clear. PLEASE does anyone know how to fix this 'glitch'?!

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