[St Charles Owl]

I click the green arrow and it takes you to the last post you have read

Yes I do that as well.  Problem is if you have sausages for fingers like I do and miss it accidentally it opens the thread at the first page and when you go back the arrow is gone as it assumes you have read the thread.  A Last Post button would always be there whether you have read the thread or not.  As I say, I have asked again, lets see if they can change anything.