Frame rate is typically set on the NVR, not the camera. In your Speco picture, it's the 4th setting down on each side.
CBR (Constant bitrate) gives you predictable data size (storage) because it will be using the same number of bits all of the time. If you don't have a lot of scenery change...
Try removing video completely and viewing remotely - do you still have the same lag? You should be using this as a remote only server IMHO.
Also, I notice from your images that the frame rate is 30fps - drop that down to 8 and see if you notice any difference.