In reply to Tyler:
I think my body tends to be a bit 'laggy', it could well be you are eating more due to more exercise but your body has switched to put on weight 'mode'.
For example I was in cogne for a week skiing and climbing everyday and only lost just under a kg since then done moderate amounts of exercise and made a conscious effort to go back to normal amounts of eating (definitely NOT dieting) and I've lost 2kg in a week!
Ofcourse its not just the calories you eat its what they are. Fats for example the body tends to want to burn and increase metabolic rate, carbs especially sugar, white flour etc do the opposite.