1) When you kill Drone I's on a beginner combat mission, it tells you that you have killed 25 bots and have to kill Drone II's to gain bonus after you kill the 26th Drone I. So it displays that you killed 25 bots and get a bonus of credits and after next kill it says you killed 25 bots and have to kill Drone II's to gain bonus.

2) Both Drone I and Drone II's sometimes freeze dead in space, not moving and not reacting to anything near them. Shooting them sometimes wakes them up, sometimes doesn't. And if it does wake them up, it sometimes happen after the first shot hits and sometimes after more shots. This was observed in Dau system, sectors K-9 and K-12.