There really should be no US planes out of Henderson Field from Guadalcanal (Cactus), since the US did not land on the island until August. How close were you to Guadalcanal?... I wonder if one of the other airfields is doing that (Port Moresby??)? We used to have troubles with B-24s doing that in earlier releases. As for 1944, there should not be that many Japanese planes coming out of Truk... These are very important issues, due to the impact on gameplay, besides the inaccuracy in real life. What type of plane was that you ID'd off of Truk? Operation Hailstone was still a month away, so it is not a response to that.
