PiHole only showing some client names

Hi all,
I just configured a fresh PiHole and use PiHole running as DHCP.
This is because I do not seem to be able to let NETGEAR ORBI run as DHCP with PiHole.
Everything if working so far, ads are being blocked, however, only a third of my devices have proper client names. the other ones are either the IP or unkown.
Is there a way to change that? I tried editing the hosts list but it did not change anything on PiHoles end.

Thanks a lot for your help!

Please upload a debug log and post just the token URL that is generated after the log is uploaded by running the following command from the Pi-hole host terminal:

pihole -d

or do it through the Web interface:

Tools > Generate Debug Log

attached is the debug. thanks a lot for your help!

https://tricorder.pi-hole.net/7aeEEDYo/

You have 2 DHCP servers running on your network, offering different DNS servers to clients.

*** [ DIAGNOSING ]: Discovering active DHCP servers (takes 10 seconds)
   Scanning all your interfaces for DHCP servers
   Timeout: 10 seconds
   
   * Received 300 bytes from eth0:192.168.0.1
     Offered IP address: 192.168.0.21
     Server IP address: N/A
     Relay-agent IP address: N/A
     BOOTP server: (empty)
     BOOTP file: (empty)
     DHCP options:
      Message type: DHCPOFFER (2)
      server-identifier: 192.168.0.1
      lease-time: 86400 ( 1d )
      netmask: 255.255.255.0
      router: 192.168.0.1
      dns-server: 192.168.0.1
      --- end of options ---
   
   
   * Received 300 bytes from eth0:192.168.0.18
     Offered IP address: 192.168.0.102
     Server IP address: 192.168.0.18
     Relay-agent IP address: N/A
     BOOTP server: (empty)
     BOOTP file: (empty)
     DHCP options:
      Message type: DHCPOFFER (2)
      server-identifier: 192.168.0.18
      lease-time: 86400 ( 1d )
      renewal-time: 43200 ( 12h )
      rebinding-time: 75600 ( 21h )
      netmask: 255.255.255.0
      broadcast: 192.168.0.255
      dns-server: 192.168.0.18
      domain-name: "lan"
      router: 192.168.0.1
      --- end of options ---
   
   DHCP packets received on interface eth0: 2

Turn off the router DHCP if you intend to use Pi-hole for DHCP.

I did that now. Sorry for the oversight.

https://tricorder.pi-hole.net/KLcyUvIk/

After you renew the DHCP lease on all network clients, they should all be using Pi-hole for DHCP and Pi-hole should be able to identify clients by IP.

If you don't renew leases, then the problem should resolve in a day as all the existing leases naturally expire and are renewed:

      lease-time: 86400 ( 1d )
      renewal-time: 43200 ( 12h )
      rebinding-time: 75600 ( 21h )