Firstly, there are some changes coming to this unit in the next release.
Next, The Sanguinary Noviate is NOT an option you can choose, it is a model you get automatically now. If your codex states anything different then you are not using the 2010 Blood Angel codex.
Lastly, When you first select the squad you start without any Honour Guard models chosen . You then need to tick the Honour Guard star button under the add units header on the right(if you want a Blood Champion then check its box). This will add a single Honour Guard model. At that point, select the line of the model you have added. Then decide what load out of weapons you will be using for that model, if you would like more than one of that exact load out then you can use the + button to multiply that single model to however many you want. If you would like different wargear for each model then you will need to go back to the top line(aka the squad line) and add another model just like before. Also on the squad line is where all of the options that are for the squad as a whole are located.
Hope this helps you.