I am looking at your account.
Your DS220 is being seen and updated plex.tv about 10 minutes ago.
Of specific note:
LOCAL ADDRESSES 192.168.1.52, 192.168.1.51
PMS and its apps do not do well when there is ambiguity of network adapters
Would you please check the eth0 adapter is set as the Default Gateway (box checked) , and if needed, consider “Bonding” the two adapters to one (common on Synology systems) so they team together as one IP address ?
