You can change the sequence of the Camera's on the NVR such that the sequence will remain valid even after restarting the NVR. These changes are also applied to the DMSS app.
(1) On Live view, right click to bring up a list of options. Proceed to click on the sequence option from this list.

Switch to <admin> user error
If you encounter this error please login to the main menu with your admin username and password and try the above mentioned steps again.
(2) Click and drag the camera from the original position to the new position

(3) Once this has been done, please click on apply to save changes. This will now save the positions of the cameras and will remain in effect even when the NVR is powered off and turned on