"Phantom" errors?

I am trying to originate an outbound fax using a call file. It appears
to work, but I am a little puzzled by some of the messages in
/var/log/asterisk/messages.

The call file is:

Channel: DAHDI/i1/01632960960
Set: OUTFILE=testignore.tiffg3
Set: OBF=01632960960
Set: ALREF=123456.1
MaxRetries: 2
RetryTime: 60
WaitTime: 30
Context: fax
Extension: faxout
Priority: 1
Archive: yes

The extension faxout is configured to call SendFax and the fax is
delivered, but I see strange error messages in
/var/log/asterisk/messages:

[Feb 27 15:33:05] WARNING[16615][C-00000034] channel.c: No channel type registered for 'DAHDI'
[Feb 27 15:33:05] NOTICE[16615][C-00000034] channel.c: Unable to request channel DAHDI/i1/08709013205
[Feb 27 15:33:05] NOTICE[16615] pbx_spool.c: Call failed to go through, reason (0) Call Failure (not BUSY, and not NO_ANSWER, maybe Circuit busy or down?)
[Feb 27 15:33:06] NOTICE[16616][C-0000002e] Ext. faxout: :20140227153306:Called No.  : faxout
[Feb 27 15:33:06] NOTICE[16616][C-0000002e] Ext. faxout: :20140227153306:FAXOPT(ecm) : yes

The first 3 lines quoted above appear to show a call (C-00000034) that
has failed, but the next lines show a call (C-0000002e) being handled
by the faxout extension. I’m at a bit of a loss to explain the initial
errors. Although the faxes deliver OK I don’t want a lot of "phantom"
errors in the log confusing any attempts to debug real issues.

Am I missing something obvious? If not, where should I be looking to
identify the issue?