If you remember the exchanges we had on this thread, the officer will decide on which visa office will be best placed (keeping program integrity intact) to process your application. It may have been that there was no information on your application showing the impending transfer/repartriation to the PH, as such, based on the available information on your application, AVDO is the office seen as the best placed to process your application.
Unfortunate, but take heed that you already had the information for necessary action this early - so you know the action to take. It is early in the process, so you have the time and the window to have the file transferred to CEM. We discussed the reasons you can use in one of the previous posts - you may want to refer to that in building your request letter.
/all the best...