The next & previous navigation arrows (as they are defaulting) are backwards, as though Next should mean next in the listing, as opposed to next in the order received. When I click Next, it goes to the message received just before it. Although there is a logic "next in list", that logic has no useful purpose. When I receive mail, I read it in the order it came in (when not selecting some needing attention sooner, etc.). The default order is with the newest at the top. To sort in the opposite order (when using a mixed new/old inbox setting), it brings many old previously read emails to the top. I "do" want the most recent emails to continue to be at the top. It's just that once I'm inside an email, the navigation arrows should tell me I'm going to the "chronologically next" or "chronologically previous" message...not to the next in reverse order as it currently is.