For Mass Effect 2 on the Xbox 360, a GameFAQs Q&A question titled 'How exactly do I chose Miranda's Side then Jack get's pissed, I then had to gain enough.
When I completed it and Miranda and Jack are fighting the paragon action is sadly still blocked so I have to choose Miranda or Jack (if I had to.
After doing Jack's mission, take Jack's side in the argument. of both characters if you're using an imported character that was made with Mass Effect Genesis.