I weighed 91 kgs last year april 27 2010,and now I am 73 kgs on april 27 2011 i am 5,10.?

Now my question is although I have lost 18 kgs,i have not reduced in size,I have lost a lot of belly fat,but overall my friends and family say that i look a lot heavier,around 85 kgs,i run 7.2 kms daily since the past one month except for one day off,I was 86 kgs for a couple of months when i used to go to the gym after april 2010,but then after i stopped going to the gym i lost a significant weight,my diet has hardly changed,except for not eating rice anymore,I have not gone to the gym past 4 months but i was not even interested when i used to go,I do not do any push ups or situps at home,so what is the reason for not reducing in overall size.?