I think that this might be a programing glitch. I have played many encounters where the shot odds were hitting within a statistical range. Other encounters, like the man said, 60% plus hit odds with 6 to 9 misses in a row. It might be a longer stretch than that, but at that point I reload the mission and try again. Straight stacked odds would show up every time, and this does not seem to do that. I was checking the forums to see if this was only happening to me. Guess not.