what if.. this isn't your "big size" yet?
what if.. this is just the "small size"?
coz age does that to our metabolic rate... i'm eating a lot less
these days.. and not losing any weight.. and am still cutting
down...
whereas you seem to be increasing your intake.. if that is
humanly possible 
heh..how u know i am increasing my intake...
and i have lost 8kg for the past few months via jogging and
eating erhh.. less buffet with less outings :)