This behavior is consistent with “Overfill Protection” parameter set on OCA group; did you perhaps set this attribute? This is easy to replicate – in this image OCA Group with key 3.x is has this attribute set, and 1.x does not (see how LMT profit taking order has green status which means it is working on the exchange)?
See more in
* “One Cancels Other” section in Mosaic manual
* in Order Ticket manual
This thread is quite lengthy and I did not study the other examples in details; SPX Bear Put spread that other poster complained about (had to hunt for the image, which is here) is likely not native on the exchange. I would appreciate if other posters could check with our support team if they have any more specific questions.
Thank you for trading with us.
Finally the troops arrive! Thank you for the response.
That could be it, so there is some default setting on the order ticket that prevents the order from being hosted on the exchange... And I see that on the ticket, but what I don't see is a place in the settings to change this default behavior to off. I hope that you are not suggesting that the order ticket be pulled up and manually edited each time an order is placed, that would not be reasonable.