The sound issue has proven a lot harder to track down, but we’re working on it.
I wish I could help more. All I can do is help finding and reporting as best I can. It seems when you first open the app when it is fully closed the sound is normal, but when reopening it and it was running in the background the sound goes crazy.
No idea. I only started to use it in 22 I think. I have seen a lot of themes that look great, but every one of my posts has an image attached and the theme I use will not display a thumbnail when on the main page, only the title of the post and a snippet of the text.