To get the true track I mark the middle of A - B and align my protratctor in the middle and read off the heading
I can't quite picture what you're doing here. When I measure the track, I make sure the protractor is lying along my route (or the extended route, if necessary), and lined up with a known north-south line, usually a line of longitude. Then I measure the angle between the line of longitude and my route (or extended route, if the route doesn't cross such a line). How do you know where true north is relative to your route, if you are measuring at the middle of your track? I suspect I've misunderstood you somewhere....
(I do agree, by the way, that measuring as close to the middle of your track as possible is desirable.)
To mark on my chart a 10 degree off track line I use the same meathod of aligning the protractor in the middle of true track and minus or add 10 degrees
This does not sound right to me.... but since I don't quite understand the way you are measuring your track angle, it's possible I'm wrong (and I'm sure someone else will be quick to say so if that's the case).
The fan-lines should be measured and drawn from each end of your route. The middle point of your route is not relevant to drawing fan lines. Line the protractor up with your route such that the point of the protractor is at one end of the route, and the route itself is along the 0 degrees line. Then mark off 10 degrees and 350 degrees (or minus 10 degrees, if you prefer), and draw a line from the end-point of your route to each of these points in turn. The repeat, for the other end-point of your route.
I'm not sure I've explained that very well - it's much easier to show than to explain in words. Definitely something that would best sorted out by having a chat with your instructor, I would have thought.
FFF
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