Originally Posted by IB-Dick

You are set up to automatically subscribe to threads that you reply to "with no notification". This means that you will not receive emails when someone replies. There are a few threads which you are set up to receive instant notifications for, but that is because you specifically changed the subscription settings for those threads. If you would like to change your subscription settings to that you will be notified of all replies to threads in which you're subscribed, you can change that in the MyFlyertalk Options page.