Still getting emails from sub forums

Might be similar to Getting mail from all topics just not the ones I'm following

I set the #beats:metricbeat to normal:

But I'm still getting email notifications:

Wondering if I did something wrong.

Another example for a new thread:

Changing the category level will not automatically unwatch stuff.

If you use the UI in to add, save and then remove, you will be prompted with a notice that will allow you to stop watching existing.