Completed is so final. I click the button and there is no way to undo it. On that note, it is very unclear that the button is "completed" looks more like an edit link.

Actually there is a way to "uncomplete it" by editing it via the comments mechanism, but that is horribly unintuitive and actually does not work always. Op, found a way to uncomplete that works, there is a link on the inbox header. PLEASE stop hiding important links. I know the design is nice and simplistic but sometimes hiding shit is bad.

Also when you edit comments for something from the status updates tab, it does not update anything in the status updates tab list, it does only after a refresh.