How does one edit their post? Shouldn't there be a box at the bottom of my posts that says 'Edit'?

I have the authority to edit my posts (according to the thing at the bottom) but don't see an edit button anywhere.

There is a 30 minute window to edit posts, more than enough time to provide corrections to clarity and intent.

Within 30 minutes, just click the EDIT link and change your post as desired.