ability to track achievements you've already gotten

[The_Countess]

I recently got the 'there is no spoon' and 'lazy bastard' achievements in one go and had a lot of fun doing it.

now i wanted to do it again (see if i can improve my time), but i can't track the same achievements anymore.

would it be possible to add tracking for a achievement that you've already gotten?
or maybe a way to 'reset' a achievement locally, or for one game?