Programm gets closed everytime i try started the mission of the day

No no. It's a reward ban. I am not allowed to access that part of the missions anymore for unknown reasons. Only programmers get access to it.

If you start the mission from the beginning, then get to a rally point, quit, and later start from a later rally point, you will not get the achievement for mission completion. This happened to me when going for "Bros to the Close" when I checkpointed after
a marine died. I reloaded and started from RP Bravo and finished the mission without the completion achievement. You have to start from the beginning and play straight to the end of the mission, using "continue campaign" if you quit before the mission is
over.

1 in every 2 of my games kicks me out mid-game to the home screen, so i gave up and tried to finish the campaign........

cannot get past the sixth mission as EVERYTIME it starts i get booted.

According to the Terms & Conditions students will not be contacted for an interview until the application process has been closed.

www.xbox.com/.../terms

After that a shortlist of eligible students will be made and contacted. The application process will be closed after the 26th so you still have a few days left yet.

www.xbox.com/.../student-ambassador-programme

I'd say the 3 star 3 minutes would be simple work around, wait till after the mission ends and all three are close to each other, and then stick close and start some havoc and get it going. Could be cool to try it out. I'm sure this is easier than it sounds.