Look at the names in the 2nd screenshot, it has a lot of the dyndns service (dyndns_home, dyndns_home-root, dyndns_hostname, dyndns_unifi) all 2 times (atleast in view in that screenshot) where there first screenshot of the docker ui only shows 1 of each. The plugin list is also (as you can tell from the scrollbar on it) a lot longer, it has multiple pages of old swarm containers that has been removed from the unraid host (through a userscript which removes unused swarm containers), all those are gone from the unraid ui but show up in the plugin ui.