Mortalis

Hi i have not been playing this game for long but i have noticed some things that realy bug me. One mission that i think shows some problems with the game is the commando mission, im in a T55 and take on 3 T34/85's, when i shoot them my AP ronds more often than not faile to penetrate and not aven at that long a distance, why? this game is supposed to have realistic amour valuse! on another mission one T34 i shot was hit in its side right on the turret ring at a range of about 900 feet/meters (or what ever the game uses) and it was still driveing around sooting at my troops! When i take on the Two T55's i notce that my shots bounce of most of the time! when thay fire back thay do not have the same problem as me, not at all. I have the realism set to high and have made shore things are to my liking in configuration's but the anemy still hase the advantage over me. Can someone help me?