The creators of the patch will have altered some players' stats because they thought they were unrealistic. If you want the players at the right (current) club, you should get one. If you like the game with the original data, don't bother.
I haven't bothered to read the whole thread, but I'm guessing you got the data update, in that case place it in the folder with the server_db file.
If it's a patch, then it should be fine unless you've downloaded it off the net/got a burnt copy.