Why does Ligo's reported second detection of gravitational waves and a black hole merger look absolutely nothing like the first detection announced in Februaray?There are more details at the LIGO Skeptic blog.
I don't know. I am also wondering why they are just now announcing a collision that was supposedly observed 5 months ago, and whether LIGO still has its policy of only 3 people knowing whether or not the result has been faked.
And why do they sit on the data so long? The LIGO folks could tell us whenever they have a coincident event. As it is, they are not telling us the full truth, because they make big announcements while concealing the data that would allow us to make comparisons.