Weird ext2fs immortal directory bug

A long long time ago, I can still remember... My computer hosed itself
(power out as I recall), and then when it was coming back up and running
e2fsck, the power went out again - perhaps not the exact situation, but
suffice to say, init ended up running e2fsck on my drive, and filling
/lost+found/ with lots of garbage, most of which I needed.

I managed to easily clean it out, with one exception. And a friend
recently suggested posting it to this list. Can anyone here
explain what on earth is going on, and how to get rid of it?

Incidentally, it's been around since a custom-compiled 2.3.x (where x > 40
I believe), and has been impervious to my fixing ever since.

Also, I'm not subscribed, so please, any replies CC'ed to
[e-mail], I'd appreciate it.

Here's the problem(s) (or at least, the symptoms):

sentry21@Petra:1:/lost+found$ ls -l
total 0
lr----S---    1 52       12337           0 Nov  1  2022 #3147 ->

sentry21@Petra:0:/lost+found$ file \#3147/
#3147/: directory

sentry21@Petra:0:/lost+found$ rm -rf \#3147/
rm: cannot unlink `#3147': Permission denied

sentry21@Petra:1:/lost+found$ sudo rm -rf \#3147/
rm: cannot unlink `#3147': Operation not permitted

sentry21@Petra:1:/lost+found$ sudo chown sentry21.sentry21 \#3147/
chown: changing ownership of `#3147': Operation not permitted

sentry21@Petra:1:/lost+found$ cd \#3147/

sentry21@Petra:0:/lost+found/#3147$ ls
#3147@

sentry21@Petra:0:/lost+found/#3147$ cd \#3147/

sentry21@Petra:0:/lost+found/#3147/#3147$ ls
#3147@

sentry21@Petra:0:/lost+found/#3147/#3147$ cd
\#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147/

sentry21@Petra:0:/lost+found/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147$ ls
#3147@

sentry21@Petra:0:/lost+found/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147$ pwd
/lost+found/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147

sentry21@Petra:0:/lost+found/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147/#3147$ file \#3147/
#3147/: directory

Weird, ne? I -did- manage to make it -not rwxrwxrwx, suid, sgid, sticky,
and every other bloody FS flag you can stick on a directory (and lots you
can't), but it's still impervious to my sk|llz. It's not hurting anything,
but cron whines about it every day.

Thanks.

--Dan