That's quite all right even for a first moult. Some birds seem to moult very lightly and the moult itself seems to last for quite some time because it's hardly noticeable, while others moult more heavily and for a shorter amount of time.
Usually on a budgie's first moult they would lose their barring on the forehead and maybe a couple of throat spots. The bigger moult where they replace flight feathers, tail feathers and the rest of the throat spots is when they reach the 6 - 7 month age mark.
RIP sweet Tito (Summer 2008 - January 17th 2013).
You are missed and never will be forgotten.