I've logged out several times, disconnected and reconnected my twitter several times but it still doesn't autopost. It worked for a few days but then it just stopped
The original implementation was a quick little thing that had been requested. Aware there's a lot of issues (recently it hasn't been playing so nice with twitter).
Making it not-as-crappy is on the roadmap, but not a priority.
Open source is coming soon but the priority right now is reworking anichart to allow updates to features for both sites, and some other more urgent bug fixes. I do know people are wanting this, though.