Not sure the exact time limit, but you're right, it doesn't allow us to edit the posts after so long.
As far as the posts numbered in order from bottom to top, you can go to your settings (upper right hand corner), go to general settings (lower left), and scroll though till you find Thread Display Options and change the default.
One of the questions I've always had is why are all the "views" on each thread messed up? By messed up, I mean that they always have just one more then the # posts in the thread. It looks like it used not to be this way.
As far as the posts numbered in order from bottom to top, you can go to your settings (upper right hand corner), go to general settings (lower left), and scroll though till you find Thread Display Options and change the default.
One of the questions I've always had is why are all the "views" on each thread messed up? By messed up, I mean that they always have just one more then the # posts in the thread. It looks like it used not to be this way.