I'm not sure if this is the right method to let you know of a problem that I see, but my host stats page (https://www.boincstats.com/stats/-1/host/list/0/0/d411ffc6c4e70f84529706e54db47306) has a couple of issues:

1) It's not showing all active hosts. Free-DC stats shows several other hosts that were recently active (https://stats.free-dc.org/stats.php?page=hostsbycpid&cpid=d411ffc6c4e70f84529706e54db47306)
2) The name of the individual host it does show changes every page refresh. I see results like "mac_pro", "MacBook-Pro.local", "Bellagio-2.local" and many more. If I view the individual host page (https://www.boincstats.com/stats/-1/host/detail/342536703), I consistently see the name "Naranjo.local" (which is also incorrect).

I've been seeing #2 for several months now, but started seeing #1 since Rosetta switched to https (though I'm not sure there's actually a connection; that's just the timeframe when I started seeing it).

Thank you for BOINCStats. I love it a lot!

On #1 if you mean the hosts list located at:
https://www.boincstats.com/bam/hosts/
Hosts that have not connected to BAM in 30 days are automatically removed from BAM according to the FAQ.

On #2 no one but you can see your host names afaik, as in when I go to the link you provide, I cannot find naranjo.local on the page so I cannot help there at all.
Good luck!

Both of my questions/issues are targeted more towards BoincStats admins - there seems to be some issues with data appearing incorrectly/not at all.

As for my hosts... all of them have been active within the last 30 days; information provided by Free-DC stats shows that.

See here:
https://boinc.berkeley.edu/forum_thread.php?id=13839

Same issues

Is there someone actually doing something about this???

my CPUs don't show up in stats.
The Collatz has clearly assigned points for my Atom units, yet only a few are recorded in Boinc Bam Stats!

https://boinc.thesonntags.com/collatz/hosts_user.php?sort=name&rev=0&show_all=0&userid=1606659

The host name issue is fixed.

Please point to some hosts that had credit is the last month that are not included in your stats.