Hi Vice84 and welcome aboard
tonnage bar not getting updated with tonnage sunk in campaign is a known problem. It is not mod-related, ai it also happens with un-modded game, and it didn't happen when the game was initially released. It simply started one or two years ago, probably due to Ubisoft replacing some files in background while online
The workaround is sticking to The Wolve of Steel or sober's mega mods, both of wich contain a workaround to this problem (they basically get rid of that bar, making the game to progress regardless of it). All of them contain Open Horizions II.
