Thanks for the advice everyone!
I finished the patrol without anymore convoy reports, but managed to sink 3 more ships on the way home for a total of 8 on this patrol. Sorry, can't remember my total tonnage-I'm at work now and don't have it handy.
I did 2 booby things on this patrol:
1.) I fired a torpedo at nothing. Cruising along, in the middle of nowhere, I went to hit the + sign on my number pad to increase my TC and hit ENTER by mistake and off went a eel into the nothingness.....
.
2.) I ran into the pier at Wilhelmshaven coming home.
I had my plotted course too close to home and the time compression too high, too close to port, and add a little bit of distraction and before I could hit backspace to pause....BAAAAM-WTF. I start getting damage reports. I zoom in and see that I hit the docks. My hull integrity was down to 37%.
So I cheated. I had saved a little bit ago while I was a couple hundred kms from home and did a redo.
Of course in real life, I probably would have lost my command and been sentenced to permanent latrine/bilge cleaner-outer and barnacle scraper.
Oh well. I'm looking forward to my next patrol. I'm going to try to get GWX2.1 and SubCommander3 mods installed first later on today. Hopefully, all will go well.