How exactly do you navigate on this website?

It's hard to find a post you saw but didn't click at the time, like the "unsolved" ones on the right side of the browser. If you don't know what to search, all you can do is press "show me more" at the bottom in hopes you might come across it again. Also how are these posts even sorted out? Posts next to each other can go from 2 months ago to 2 years ago.