How do player based raids work in a dedicated server?

[Nightwalker]

Hi guys.
I have a dedicated server with some friends, and the setting 'player based raid' is on, since I'm the one progressing faster, and they complain about raids.

I've defeated the queen and I'm waiting for them to catch up so we can enter ashlands toghether, but since I've defeated Vegvisir some of them are getting mistlands raids, and since I've defeated The Queen one of them got an ashlands raid.

They were not near when I defeated the bosses (not even on for the queen), and I didn't hang the heads, since I like the Bonemass power. They promised me they have not come near my base as to not unlock this kind of raids.

I've made a copy of the world and got the keys with listkeys command, I can see all the bosses so far, like 'defeated_golinking' and 'defeated_queen' inside 'current keys' section, wich I guess it's normal, and I also see 'playerevents' in the same section. Then I see a list separated with ':', 'raids_default' is in it. I guess this one is the frequency setting.

In the' server option keys' section I see no boss keys, just the 'playerevents'.

Then in the 'player keys' I see only three defeated keys, queen, goblinkin and dragon. I don't know why the others are missing.

Do any of you know how this works? even if it's just to avoid this kind of problems in our next run.
Thank you.