I spent quite a while, tracking in the code where this goes wrong, but I need some input from the developers, so I have escalated this thread, and I'll get back to you when I have some feedback from them.
You have added front-end sorting controls, but Views also have an ordering setting (screenshot).
During the implementation of this feature it was decided if the ordering setting wasn't included in the front-end sorting controls, it would be automatically added.
Just change the View ordering setting so that it includes any of the fields used in the front-end ordering controls.
Ok, So there is a beackend view( under Toolset views). If I edit this view and only add the 3 options that I have on the frontend... that they Post date will drop-off? IS this understanding correct?
If you add Front-end Sorting controls and the same field that is set as the View order is not one of those fields shown on the front-end the field used for the View order setting will automatically be added as well.