Currently the notifications are ordered according to time and in 'oldest first' manner. It's always better to have notifications in newest first chronology. Is there any strong motivation for having notifications in the 'oldest first' order?
Now switched to 'Newest First'
> Is there any strong motivation for having notifications in the 'oldest first' order?
I'm not sure there ever was a good reason — I think it was to mirror the 'newest messages at the bottom' idiom of the comments pane, but that pane scrolls to the bottom by default unlike the notifications pane.
On balance I think you are right and we should have 'newest at top' rather than auto-scrolling down anyway.