When looking at my reputation history, I noticed that when I sort by time, it only sorts the days that are expanded by default (today, yesterday, and 2 days ago) and that when I expand something older it is still sorted by post.

Here is a screenshot of the behavior (with today and 2 days ago collapsed because they get in the way):

![enter image description here](https://i.stack.imgur.com/ewvMD.png)