It's a bit more complicated than that, If you are tagging people (or quoting a note), the note will also be published the theirs inbox relays, so these people can be notified.

Your note will also be rebroadcasted to other relays you don't control as other people start to interact with your note, so there's no way to know where your note will ended up.

The "Seen on" indicator isn't 100% accurate and there's no way to make 100% accurate I think, current nosotros has a default value of 3 relays per person to fetch notes from for performance/bandwidth reasons, you can change that on settings which may impact the value of the tooltip.

Also changing relays settings makes things very confusing, but your relay settings looks good to me