ntpd drifts depsite pll state

[manu%netbsd.org@localhost (Emmanuel Dreyfus)]

Hello

I have a strange problem with ntpd: clock drifts while the daemon
reports kernel status pll, which as I understand means NTP
synchronisation is good:

# cat /etc/ntp.conf
pidfile         /var/run/ntpd.pid
driftfile       /var/db/ntp.drift
logconfig       -syncstatus
server          192.0.2.20

# ntpq
ntpq> kerninfo
associd=0 status=c016 leap_alarm, sync_unspec, 1 event, restart,
pll offset:            0
pll frequency:         0
maximum error:         756.265
estimated error:       1.6e-05
kernel status:         pll
pll time constant:     3
precision:             0
frequency tolerance:   495.911
pps frequency:         0
pps stability:         0
pps jitter:            0
calibration interval   0
calibration cycles:    0
jitter exceeded:       0
stability exceeded:    0
calibration errors:    0

# ntpdate -uq 192.0.2.20
server 192.0.2.20, stratum 2, offset -10.022205, delay 0.02600
 2 Feb 03:42:25 ntpdate[15369]: step time server 192.0.2.20 offset
-10.022205 sec

Is there something wrong in the configuration, or do I misunderstand
kerninfo output?

-- 
Emmanuel Dreyfus
http://hcpnet.free.fr/pubz
manu%netbsd.org@localhost