I've noticed at least 2 cases where a problem I've previously decided on came up again. This should not happen, as every matter can only be decided once, logically. Unless there were any follow-up issues brought up in a different perspective.
But the issue that I believe is a bug lies in that I've had previously decided topics come up again. Unsure if it has to do with loading a previous game.
So you made a decision on Turn 5, saved on Turn 6, and then later went back and loaded the Turn 6 save and had the previous Turn 5 decison some up again? If decisions you made before a saved game are coming up after that, it's a bug.