Hi all,
happy ending - did get a entry to lounge just by being polite and showing up and explaining situation.
The lounge dragon did check everything though --- BP on the original flight. check computer to see remaining miles, check when is next flight and that it is on CX, even check name on passport match Boarding pass.
After all that --- and a call to duty manager that I would be there only for a couple of hours and it isn't too full... got the reentry stamp on connecting flight BP