Re: Genesis Mass Effec 2 using Mass Effect 1 save
The main purpose of the Genesis comic is to allow Gamers who didn't played ME1 to make the major decisions of ME1.
The only decision you can make if you import a ME1 character is the Andeson VS Udina decision, all other decision will be read out of the ME1 character save-game you imported.
Or in other words, what you experienced is normal behaviour.
If you want to change some decisions from ME1 but keep others you need to use the "Gibbed Save game editor". Here you can find a guide.