Macguba and General Barron are usually very helpful. Try writing them an PM on the subject
I can't speak for GB but please don't send me IMs with editing questions. If I see a question that I can answer, I will. I get quite a few IMs on editing questions and as a rule I don't know the answer. Keeping stuff in the forums means that everybody can see both question and answer - a typical thread helps many more people than just the original questioner.
I've never made a MP mission and I don't know much about it except that you must read snYpir's OFPEC Guide: MP missions before doing anything else.
I really don't like Death triggers. (They do come up on the forum from time to time, use the search function.) In general they are just bad mission design. If you, the mission designer, don't want the player to leave a certain area then use your imagination and mission design skills to make him stay. As a rule, leaving the mission area is its own punishment: you're wandering around the island with nothing going on.
If you want to ensure that the mission functions correctly, for example if it is important that the players go to point A, pointB and pointC in that order, then use triggers and variables to control what happens. If they go to the wrong place then the expected outcome just doesn't happen, or another outcome happens.
Triggers set to repeatedly do not fire continually. They fire once then wait for the condition not to be satisfied. Only once they have been deactivated can they fire again.