OO Duplex print problem

I don't understand the comment about vanilla OO. I reported a problem with a
vanilla OO and get a response regarding a different version than the one I
reported. I was asked to provide files to reproduce the problem and I did,
again using a stock vanilla OO. 

The problem remains that OO doesn't send the correct duplex parameters. I
requested the version of working cups but never got a response. In fact the
problem has drug on for quite awhile with no action so I've had to find
temporary alternatives to OO to solve the problems. Honestly I don't have much
hope at this point. Seems either I will have to hack a solution myself, when
time permits, or abandon OO; a sad shame.

Stan