Totally unacceptable .
After reading through the thread, I am sorry to say this is gross operational error.
Totally unacceptable from ATPL pilots.
Understandable if you are low time PPL pilot, and yes humans make errors, but these types of errors should not be happening on commercial flight deck period.
2 pilot crew, 2 pilots fail to recognize this? State of the art airplane. Please no excuses.
The traveling public deserves better.