Board Thread:The Quarters - Q & A/@comment-207.255.197.238-20141202221703/@comment-24150802-20141204074213

That task is harmless. You can delete it. For more information see "Habit Added by a Third-Party Service" in the Known Bugs page.

On the website, click the "clear" button next to the tags, even if it looks like no tags are selected. Do all of your tasks appear now?