Not being in the box doesn't mean they are fake. I wouldn't worry too much about that. As for the tops of the caps, hell... I've seen different colors on alot of products... there is no sure "oh, this is white, this is blue" to tell if it is fake/real.
If I had to give an opinion, I would say your Deca is good... numbers, labels... they all change, as long as your source is good... you should have good stuff. The question you should be asking yourself is How good is your source? How much do you trust him/her?
C