Your SEP Class Rating expired on 20 Aug!! Thats it, you now have to renew, and that means a flight test with an examiner. Your M/E revalidation did count as a flight with an instructor, but as you have not revalidated within the validity period neither that nor your 14.5 hours count any more.
You must revalidate before the expiry date and you can do it up to 12 months early, one day over and it has expired.
[ 03 September 2001: Message edited by: Noggin ]