You're most welcome.
From what you write of your Pottermore responses, I would not find fault with the Pottermore wand-choosing for your Pottermore result. It seemed to do a good job distinguishing something you may(?) not have done at the time you took that quiz . . .
. . . answering, on the one hand, as if you "are" Bellatrix (which may be very hard because you are not "standing in the shoes[mind]" of someone who performs terrible deeds, intends them, and remorselessly relishes them!) versus, on the other hand, answering as yourself.
It still doesn't guarantee particular results, of course, and the tests are far from perfect.
In my own case, for example, I love Helene Bonham Carter's acting in HP (she played, and Rowling wrote, Bellatrix so brilliantly) and her other films. I experience Helene to be smart and appealingly singular in real life.
But, like JK Rowling, I fear (thus abhor) the depravity of intention and behavior that characters such as Bellatrix (similarly, Helene as the Red Queen), Umbridge, and Skeeter represent. I also am deeply afraid of the personal, social, and political consequences that arise and are empowered by the apathy or scapegoating that individuals can tolerate or even participate in and uncritically allow to become pervasive in their culture. Rowling illustrated this soooo terrifyingly/painfully well on a number of occassions in her books. These are vivid reminders of the profound importance of Dumbledore urging us "to remember" Cedric when, moment by moment, we must chose between easy and right -- typically myriad mundane "little" things, rather than some big heroic moment.
Nevertheless, I chose the silver dagger from the chest. I happen to really be fond of knives (and certain other hand tools) for peaceful purposes, and for their asthetics. In my analytic mind, though, I feared my dagger selection might influence the wand quiz to presume I've dark leanings that I do not in reality possess; it certainly was a factor the times I've been placed in Slytherin. In this way, the sorting quizes see the surface but don't plumb the true motivations and intentions in a valid or sufficiently complex way.
I should clarify that I don't consider the non-Pottermore wand selection tests superior. They can be criticized for as many or more reasons than the Pottermore sortings, which dohave much more than merely arbitrary factors involved; the two I mentioned in an earlier post are the only ones that have nothing but arbitrariness about them. The rest of the PM wand selection is based on associations with one's thoughts and feelings, albeit a bit simplistic in assumptions.
None of the quizzes is scientifically valid and reliable -- like, sadly, so much that we humans choose to believe. (Many of us "think" with our feelings, not with a somewhat objective intellect, and then convince ourselves otherwise by making up reasons to support what we arrived at via a route other than reason.)
Nevertheless, the quizes JK Rowling wrote are -- for purists -- "the" sorting and wand-selection quizes. And JK wrote the quizes used in Pottermore. I figure that which quiz (or simple self selection) one choses depends on the purpose for which one wants to be associated with a house or wand.
