The portal page is the latest updates to all discussions.
The new posts lists is for stuff you haven't seen yet. If you clicked on a thread from the portage, it will not show on the new posts lists unless it's been updated with a new [post since the last time you looked.
To see a list of all new stuff since your last log in, look under the quick links drop done menu for 'todays posts'
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Sing to a sailor's courage, Sing while the elbows bend,
A ruby port your harbor, Raise three sheets to the wind.
......................-=Krynnish drinking song=-