There was a 30 day lock on editing posts but I’ve just removed that for Trust Level 2+ users so you should be able to edit the post now.
The PWS Dashboard ‘About the…’ post is About the PWS Dashboard category - Weather - Internet / PWS Dashboard - Weather-Watch.com. Which other one were you looking for?
Pinned posts don’t work the same way as sticky posts in the old forum. Once a user has read a pinned post it becomes unpinned and moves to wherever it would be in the category list based on posting date. There might be other options to keep useful info in an easily locatable place…I’ll investigate.