Detail in "John Adams"

I hate to be a nit picker at such a wonderful production as HBO's John Adams mini-series, but I did notice a mistake in the second episode. During the second Continental Congress, we see George Washington in uniform. This was true; however, in the mini-series, we see him wearing his Continental uniform, when in reality he wore his Virginia regiment uniform. Also, Washington was only 43 years old at this time; in the mini-series he looks at least 60 years old. I realize that this is just a mini-series, but its "making of" documentary went to great lengths to describe its historical accuracy. I wonder why, then, they would make these two fairly easy to check mistakes.