The Joint CAS pub is easily downloaded off the internet, and since I have some experience in this...
A Final Attack Heading (i.e., line 2) is the most restrictive control measure. All attacking aircraft must fly that specific heading (i.e. 270). If you give them an offset (i.e. Right), that means that when they roll in on the target, they have to be heading 270, but they manuver to position themselves on the right of the IP-target line. If his heading is NOT what was briefed (i.e. 271) he must abort himself.
Final Attack Headings (read in the remarks section) are not as restrictive. General rule of thumb is to provide 30 degrees (240-270) to allow the attacking aircraft the ability to maneuver his aircraft as he sees fit, remain unpredictable, and allow the release of ordnance (as long as his heading is somewhere between the two, he doesn't have to abort himself).
Final Attack Cones are used for laser missions. Semantics, because they initially appear to be the same as headings, however when you say "cone" it means you have completed the laser geometry calculations.
As for what's going on in the aircraft, couldn't tell you to save my life.