I saw Rise of the Footsoldier Vengeance last night, and i got some questions

As i will be giving away spoilers, im gonna have to mark this thread as a spoiler.

I saw the movie last night and ive got some questions

1) Why did David Hexell (The guy who played Yetti in The Firm) put a hit out on Patrick?

2) Why did the woman who lived with David Hexell put a hit on Patrick?, the way she was eves dropping on David Hexell ordering a hit on Patrick, just didnt make sense. Why put a hit on someone where you already know someone else has put a hit on them

3) Why did the woman who lived with David Hexell get whacked after she met up with that guy to put a hit on Patrick. What did she do to earn herself getting whacked for?

4) Im assuming that Mo (the old boss guy with the eastern european accent) did not die from Patrick Tate shooting him, as we see him right at the end in Ibiza (inless that was a flashback scene, but i assumed it wasnt).

5) It was really daft and far fetched that when both Patrick Tate and Billy The Kid's father both walked through that nightclub with unconcealed shotguns, that no one noticed and no one panicked