Same as the other person that commented on your original post a few hours ago, I'm not able to replicate your issue. A lot of people are using the instance and I haven't seen mention of the sorting issue, so I suspect it might be something with your browser / extensions setup.

You're free to comment how you feel, especially because it sounds like the experience hasn't been that great for you, but I still feel that people here are happy to help you troubleshoot. :)

Some other steps you can try:

• See if you can sort on one of the apps, that would narrow down the issue to the web UI: https://www.lemmyapps.com/
• See if you have the same issue on one of the other instances. I suspect it would be the same on all instances running this version of Lemmy (0.19.5). There is a new version of Lemmy out, but a lot of instances seem to be waiting a few days in case it introduced any issues.
• Some browsers have a troubleshoot mode, which can tell you if one of your extensions or themes is causing the issue: https://support.mozilla.org/en-US/kb/troubleshoot-and-diagnose-firefox-problems#w_3-restart-firefox-in-troubleshoot-mode

Can you explain further, or give an example?