rather than implying that the people who took you at your word did something wrong, you should admit that you used a poor choice of words. As I said, you could

rather than implying that the people who took you at your word did something wrong, you should admit that you used a poor choice of words. As I said, you could simply have said, "I will only work OT in exceptional cases, and these cases should be rare". It doesn't take an entire paragraph to get this point across. You get the idea.