Yeah, heading distances are a bit awkward - especially because the lower one ("Direct Messages") is closer to the first item than the first to the second item.

Yeah, heading distances are a bit awkward - especially because the lower one ("Direct Messages") is closer to the first item than the first to the second item. But I'd say it doesn't hurt usability too much. If anything, I'd rather tackle the slightly different font sizes in the left and right area first.