Not sure what the prob is, but my shaman misses half the time....i've had 5+ misses in a row. It is very common for me to have more misses than hits during a battle.
This game is very well done, except for the difficulty level. After the first few levels, u can beat every level with the same strategy. First unit sniper,and if the map allows, make a 5x5 sniper diamond with a power amplifier at the center (power amplifier probably not necessary).