Can't subscribe to comment topics

[Sam324]

Hi. There are a few mods for which I would like to be notified by email when they receive new comments. However, when I clicked "view forum thread" on the comments page and then "watch topic", it doesn't work. It says "stop watching topic" instead now for these forum threads, but I'm not getting any emails, nor am I seeing additions to the notifications page on the forum. I have my settings so that I get emails and inline notifications about new replies to watched forum topics, and this works for non-comment topics on the forums. Am I doing something wrong here?