Posted 09 July 2011 - 08:35 PM
If you click on the drop-down arrow on the upper-right of the screen next to your username, then select "My Settings" and then "Notification Options", under "Notification Preferences" there's a box you can check for "Watch every topic I reply to".
With regard to the notifications, I believe it will only notify you once per topic that someone has replied until you log on again. So, for instance, you could receive 5 replies to the same topic between the time you post and when you log on again, but you will only be notified of the first one, and not of all 5. I'm not sure if that is what's been happening with your notifications. I believe the notification digests work differently and give you all of the replies and not just the first one, although that will be either daily or weekly and not an immediate notification - you might want to try and see which one can provide you with the notifications that suit you best. Here's the run-down of the different options, since the descriptions don't show up under the User CP.
No Notification: This option will not send out any notifications, but will retain the topic in your subscriptions panel.
Delayed Notification: This option will send out a notification if a reply has been made and you're not active on the board.
Immediate Notification: This option will send out a notification immediately after a reply has been made, regardless of your activity.
Daily Digest: This option will send out a daily digest showing all new replies for the day
Weekly Digest: This option will send out a weekly digest showing all new replies for the week