I won't bother to look for more errors; one is enough. When you try to teach something, it is indeed a Good Thing to first know it yourself. The guys at Marinews missed out on exactly that point, but that is not all...
I'm sorry that I cannot find the instructions re Owen Nuttall possible to follow in this form. The reason, I am sure, is linguistic. I don't grasp what a "bight" is in points 1, 2 and 3, and I cannot form a cross by laying one "bight" over the other, whether not a bight, but a round turn or a half hitch is what was intended. It might be helpful with a simple sketch.
But what's more important is that we're talking about
Practical Knots. I am a rigger and a sailor. I won't use a knot that needs intricate patterns formed by one or the other part or by both. A practical knot mostly will have to be tied easily in the hand, without much chance of making an error. Preferrably you should be able to do it without any reeving. All the "Animated Knots" are shown with first one end growing, or moving like a worm, then the other one rove through the pattern. That is something that cannot be done that way, and the only practical knots that need reeving are those that can be done comfortably in your arm-chair. An anchor hitch may be formed like that, but most useful knots are not.
You should be able to tie it in complete darkness, with water pouring over you and with gloves on. The knot should not need any "gentle easing", but be ready to use after you have finished making its pattern. Among bends, the Carrick Bend is about the only one to meet those requirements. The sheet bend too may be tied in hand under awkward conditions, also in darkness, but it lacks some of the last requirements; it needs working taut, and it is not easily done wearing gloves.
I am not a "knot tyer" for knotting's own sake; I make knots as a means to an end. In my practice I need reliable knots, knots that may save someone's life, but will never put anyone's life at hazard. I cannot afford making an error when tying a bend, because I might not get a second opportunity. Therefore, reliability is a prime value, there are of course also others. After inventing a simple method to tie the Carrick Bend, I have hardly used the more regular bends, like the sheet bend or double sheet bend. Whenever a bend is needed, I use the Carrick Bend, because as Ashley says: "it is perhaps the nearest thing we have to a perfect bend".
So Barry, please show me what you mean by those bights, how you cross them and how you pass the ends, and how this can be done reliably, blindfolded, wearing gloves and under the shower (all at the same time), without any opportunity to put those lines down to follow what you are doing.
By my method I can tie the Carrick Bend at pitch dark night in a blizzard, with gloves on, even in heavy stuff; works for me.
http://www.youtube.com/watch?v=wTmwqYQI93Y 
