I posted the amateur astronomer's report to refute some who are saying that NASA and the government are trying to hide the truth. Now, just because a person is an amateur astronomer, does not mean that he is not an expert. It just means that he doesn't work at that as a profession. The amateur who doesn't get paid by the government can serve as an independent voice to confirm that the government is telling the truth about an object. In answer to your question, there is nothing any amateur astronomer has found, that I am aware of, that contradicts the JPL published information on Elenin.
As far as "alignments" go, that is more of an Astrological priority concept, than a scientific one. Anyone familiar with vector math knows that there is no magical contribution of forces due to the alignment of vectors. The forces add up based on trigonometric functions which vary continuously with only small contribution changes as a function of small angle changes. For instance, the change of the component force contributed by a two degree change in alignment of two vectors is less than two tenths of one percent (<.002). Nothing magic happens on a tectonic scale due to forces changing by a factor of .998 on a particular day. See how alignment is very important concept to astrologers, but not to scientists. To me, the people who create videos promoting the disaster/alignment association, are showing their ignorance of math, and are more interested in promoting themselves than the truth.
I also worked for NASA for almost 10 years, and I can tell you from experience that it is not possible for NASA to keep a secret such as Elenin being a brown dwarf. Many employees, like myself, would not allow such information to be kept secret from the public. Perhaps "men in black" organizations can keep such things secret, but NASA cannot!
If you want to talk coincidences, you don't have to look any further than Five Doves. I don't know how many times John, himself, has published things that looked like they couldn't be coincidences concerning the rapture, but we are still here. It would be interesting to know how many times someone has used the word "confirm" to indicate that their report couldn't be a coincidence because it had been confirmed, but coincidences do happen and depending on what kind of shaded glasses we look through will determine how we interpret them.
As far as scientists predicting pole shifts, the problem is that they don't have a good enough understanding of the physical processes that produce the magnetic field to create a detailed model of the field. Without a verified model, they have no way to predict exactly what will happen or when. I can't answer your other questions and I have a few of my own that I would like answers to, like who was behind the killing of JKF? No matter how others "feel" about the answers, feelings can't refute facts or math, and consensus doesn't necessarily mean something is true.
In walking by faith, and not by sight, I don't need astronomy reports to tell me that we are in the last days and it appears that the birth pains are getting stronger and more frequent. I don't have to see Wormwood approaching to know that it is out there somewhere and probably won't be seen until it is alarmingly close. Regardless of all the "Yea" or "Nay" sayer reports, the best we can do is be led of the Holy Spirit and we won't have to be concerned about who is right and who is wrong. As the three Hebrew children said concerning the firery furnace, "our God whom we serve is able to deliver us from the burning fiery furnace, and he will deliver us out of thine hand". I rest in that fact and try to follow the still small voice who seldom speaks through the wind, the fire, or the earthquake. My point being, don't search for your answers from others, but have faith that God can lead you to make whatever preparations are necessary and live in peace without all the answers.