Did you set maye more agressive tactic thats maybe you get yellow cards, or if you put in touchline instructions get stuck in or hassle opponent and for injuries its probably bug
started a game as my hometown Hereford, in pre-season I had 7 injuries. Four of which were serious, and three of them were out for over 4months. Stupendous!
I've had 4 injuries over 3 months, which basically takes the players out for the whole demo. And the injuries were to Messi, Iniesta, Pedro and Puyol. Oh and my new signing tevez is out for 4 weeks as well... I think it's just bad luck but come on!