I don't know, my question log thing says,
Stephen» has deleted one of the questions received from you, yesterday.
And there's also an answered question that I sent to you 7 months ago,
Though I don't know if you can answer said question whenever, and it'll still show 7 months ago.
Still, I usually check my question log, and avoid sending questions to people who already have one unanswered question,
As I assume they don't 'want me sending them questions,
So I assume you answered that question 7 months ago, then forgot about it,
Then deleted the new question yesterday,
Then saw the old question you answered, and had a question of your own.
Though I may be wrong, such is my guess.