The questions on the main page are not ordered by recency, but by most recent activity (new answers, or editing of questions or answers). Comments don't count/.
However, on your personal question2answer site, you can change this so that comments also do count .
You can order by recency like this: http://www.question2answer.org/qa/questions
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.