I was sure that the threads in the "Show new replies to your posts" was in my watchlist up until yesterday. also the thread
$10k?? ?? which wasn't listed in my watchlist (but watched) when I took the screenshot is now showing up in my watchlist.
Well, I don't know about the way the watchlist itself works.
To make sure, I'd check the status of each thread on the "Show new replies to your posts" list manually.
If they look like this, it should be fine:
If they look like this, something's wrong and you might have to watch them manually or make a new post in them:
I guess your "problem" is only temporary and will go away when you've caught up between watchlist and replylist.