May I ask what version of game you have and where did you bought it? I've tested the trainer few days ago and couldn't find any reported bug on the original GOG version of the game. But I'm still on the first island or whatever it is called, do the problems appear later on?
The bugs are fairly subtle but they're definitely there on the released version.
The biggest bug I know of was the one where it would set your Scouting stat to five (or a random number) after loading a game. I've heard there was also a bug which would cause injuries or diseases to heal incredibly slowly.
I have it on Steam (to get the early patch) and GoG (who released their patch a few hours ago).