Hi,
If you have a laptop on hand. Please connect this laptop to one of the PoE Ports in your NVR-ELE32C-16P4K.
Use the config tool to set all of your cameras to DHCP, after doing so remove all of the cameras under the Remote tab.
You will then need to manually input each camera using the " Manual Add" button on te Remote Tab. To see your cameras IP, use the Config Tool. After doing so, you will no longer get doubled channels.
The issue comes from setting the cameras to static on the internal Switch. 
Let us know if you completed this and your findings.
Open a chat if you need assistance.