I've recently completed the first patrol on a new career (my 3rd career). I sunk over 60K tons of merchants (including a passenger liner). My log shows all the kills; the patrol status radio message I sent out showed the correct tonage; but when I got back to my base, the debriefing report showed 0 ton, and (therefore) 0 renown, no reward of any kind. Is there any strange combination of events or any known bugs that would cause this???