It's not a bug. Keep in mind at that moment all the pre-match actions have already been set and they have an influence over the game. If you went into a mind war, or didn't, the players morale and reactions and so on have already been set for better or worse.
As it goes for injuries, I'm not sure, but I've observed from games where by one or another reason I had to reload from a point previous to where I left it, it appears like there were at some point of the day/week a roll to determine chances of players injuring or how many and then new rolls to check who gets injured. For instance, once I saved at Wednesday, then went on and that eveing my striker gets injured for three weeks. Then I am called to have dinner, I close without saving and in the evening I load the save and then it's a midfielder who gets injured for four weeks. As if at some point before saving the game had decided that one player would get injured but had not yet chosen who. Now, I can't be sure if it's like that or just coincidence that when I save at some point and get an injured player, when loading from there I again get another player injured. It may as well be that some day by the time passed after a match or by match schedules it becomes a high injury day and it's just too hard not to have injured. In fact I've just remembered the last time I saved the same day or one before someone got injured the second time after loading nobody got injured.