The app suddenly seems to have started automatically adding threads you post on to "watched" threads. Every time I post on a thread now, I have to unwatch it 
If I want to watch a thread, I choose to watch it. If I post on a thread, then I can check "Threads I'm On" 
In rare occasions, I might choose to watch a thread that I am also on (as I might use it for reference once it has filled up).
This seems unnecessary duplication and is irritating 