This is a known problem. It is because the SBQ line contains the word Post and that is making it show under forums. Bug has posted about this before:

"I've made a note, but probably won't tackle this immediately, since it's a minor error and would take a lot of effort to fix. We would have to rewrite the events system so that it doesn't rely on what words they contain to sort them - and while that's something we'll definitely do someday, it's not a priority at the moment. Thanks for understanding."