When I click the forums link on the left side of the page under the adv menu it takes me to the Forum sneak peek page where it has my old league, V.29. But I promoted last seas/on into IV.1. The drop down menu shows my correct league though. Is this a bug or is there a way to change it on the page?
You need to manually add the new forum to your favorites. Easiest way to do this is go to your league page, click on the league forum option, and then click "Add to Favorites"