Wrong date

I am running the NYGM mod as well as SH3 Commander. I pulled into St. Nazaire in September 1941 with my type VII and decided to switch to 2nd Flotilla and grab a type IX to go check out the North American coast. I switched to 2nd Flotilla and got into a type IXC and upgraded it to where I needed it to me. NYGM advanced the date instead of spending renown, so as a result it took me from September 1941 to February 1942.

So I set sail to patrol the waters off the Carolinas in February. The loading screen shows me info from January 1942 for some reason. Then, when I get into the game I find my starboard diesel is destroyed (though at flank I still make 20 kts). And I also see that it's October 1941.

My question is twofold. First, why is my engine being destroyed? No, I'm not imbedded in a wall or anything, I'm sitting in open water when the mission starts. And second, how can I get the dates to sync up so that it's February 1942? I'd hate to make the trip to North Carolina only to find out the U.S. isn't in the war yet!

By the way, I do not have SH3 Commander set to bother with my dates at all (both date options are unchecked). I thought everything would be cool, but apparently it's not.