Thanks for replying!
Yes - there should be consistency from customer to customer and over the years, the product (the homestudy course) should have become better instead of (what you perceive as) less complete.
But I find the whole course a little simplistic and lacking the kind of detail a true scholar would look for. It is not a springboard to discovery unless one has far greater cross dimensional knowledge of harmonics, music, electronics, magnetism, zero point paradigms and I could go on. If one stays strictly with Russellian teachings then one can go far but one can also get side-tracked by inaccuracies (erroneous or incomplete interpretations of what in essence may be quite true).
Keep going - persistence will pay off one day.