Unable to delete
I am unable to delete the watchlist group I created after it got hosed up. It got hosed by me deleting a page that contained properties I was watching. Restoring the page didn't fix it. Internal server error on Semantic Watchlist page. I had to stop watching the group in order to see the Watchlist page again.
Is this normal behavior?
It's probably normal in the sense that this is happening for everyone, but it definitely ought to get fixed :) Right now the extension is still very much in beta stage and it needs a pile of polishing and more testing to become stable. Unfortunately I myself do not have any time I can spend on this right now.