Ok so a lot of people have this bug so I've filed a bug report here. Thanks everyone who replied!
Okay so I might have found a bug, if I see that more than one person has seen this bug then I'll submit a bug report. Here's the bug:
Have you ever scrolled to the bottom of Repl Talk and clicked the Load More Results button, and you see duplicate results? Usually, when I click that button, I'm shown more, but sometimes it doesn't work. When I click the Load More Results, some of the same results show up again. Here's a screenshot:
(Orange lines drawn by me to show duplicates)