Sorry guys. We go by the Victory Condition that Civ4 awards. Anything else would be chaos. Creating conditions where multiple Victory Conditions are possible is controllable. Like with accidental Domination victories, you have to manage that.
I have to put in my opinion that the policy in this case is wrong in this case as it is obviously a bug ( there always has to be the possibility of exceptions to any policy). It was not controllable, with the information we had. If you make it to the last turn, no matter WHAT you do, the game is supposed to give you a TIME victory. Some people spam settlers and get a Time Victory, others get a Domination Victory. After putting 20 + hours into this game, to be defeated by a bug is just too much. I would suggest we allow him to load up his last save and replay the last turn.
Anyway, I think I've found a possible condition that causes the problem, but I need to do more research, I would appreciate it if others would also check my results.
I tried the procedure I outlined yesterday on a Future Start Settler game, and I could not, at first reproduce the bug. No matter what save I used or how I loaded the save, I kept getting a TIME victory as it should be. So Denniz, I think you are right that it is not the type of save that is causing the problem.
Finally I clicked on the "End Turn" Button when it was green rather than red, that is I forced the end of the last turn when units were still waiting to be given orders. I got a conquest victory. I tried this several more times, and always when I got the wrong type of victory it was because I clicked on the end of turn button when it was green (once when it was green I got a Time victory, so the bug may require some secondary condition).
This matches with my earlier tests, although I didn't understand it at the time. I would start up the game, play a normal last turn and get a TIME victory, then I would reload the last turn save and get a Domination. I think this was happening, because with my second game, I was usually just checking for the Domination so just moving enough units to make it happen then forcing end of turn to save time.
I would ask that others check this out and see if I may be on to something. If so, to avoid the wrong type of victory, what you need to do is end the last turn normally, with an Enter key instead of shift-enter, or clicking on the end of turn button when it is red only.
IglooDude, could this be the reason for your Domination?