Dont know what to think about my weight as an indicator of progress at this point...

So I have been exercising and trying to eat healthy since about the beginning of June 2012. I was about 185lbs/84kg. By Christmas last year I was maintaining a weight of 153lbs/69.6kg. I wash't able to keep as strict a diet while I was at home since the majority of food in the house was holiday themed but my family is supportive of my healthy lifestyle and they are all getting in on it too. Fast forward to now, I'm at 159lbs/72.2kg (also im 5'9"/175.2cm).

For the most part I have ignored my weight as an indicator of anything and I have been going by what I see in the mirror. I know muscle is heavier then fat but I was wondering if I should worry that the gain in weight is more then if it was just muscle.

http://i.imgur.com/Xr5YZ00.png

http://i.imgur.com/Hs3YwYC.png

http://i.imgur.com/ah10Wc7.png

http://i.imgur.com/aAkSHtP.png