For editing an existing topic title then use the forum tools in the forum view (topic listing). If you haven’t yet discovered the forum tools then this will explain: http://codex.simple-press.com/codex/faq/problem-with-post-edit-buttonow-to/problem-with-post-edit-buttonow-to-delete-a-topic-or-post-and-other-tools/
The answer to the second question is both yes and no! First an explanation. SP displays topics sorted by the the most recent post made to them. So if you make a new post to a topic it shuffles it to the top (assuming your sort order for topics is set to newest first). The only difference for pinned topics is that they are displayed first but the sorting sequence is the same. This is why you are getting what you see. There are no built-in options to effect that sort.
Now- having said there are no built in options we do have an open ticket to address this as it has been requested before. I will take a look at it this morning to see if it is something I could slip into the next update as it should not be that difficult to add. The UI is the most time-consuming part of that.
Now for the ‘yes’ part of the answer. There are two ways you can arrange for it to happen now. The first is simply to add a new post to the pinned topics in reverse order to how you want them displayed. This will work just fine if the topics are locked as well. If people can still post to them though they will, obviously, lose that sort when a post is made.
The second method is to use the filer hook that is available on the query to change the query order by directive to sort the pinned topics by topic ID instead of most recent post ID. This is not actually that hard to do and should work – although I have not tired it myself.
