You do have to tip your hat off to them: they are good at finding "fishy" 
things, real and imaginary (especially the latter). But if you have an 
event that is as studied as much as the assassination - is there another 
that's been studied more than this? or even closely as much? - you're 
going to come across strange things. And *real* strange things. It's 
unavoidable.
The author John Updike made this observation in 1967 (even at that early 
date he recognized the problem). In studying the assassination, Updike 
wrote:
"We wonder whether a genuine mystery is being concealed here or whether 
any similar scrutiny of a minute section of time and space would yield 
similar strangenesses—gaps, inconsistencies, warps, and bubbles in 
the surface of circumstance."
He's talking here just about the shooting itself, that some thirty odd 
second segment of time and not all of this related "strange" material that 
has emerged since 1967. Add all of that and things get really warped.
If you insist on placing these "strangenesses" into the assassination, 
stating they are significant or relevant to it, you're going to get a, 
well, "strange" result. The strange factors don't seem to fit; at least 
fit the Oswald as lone assassin claim.
So the explanation for what happened must be adjusted to fit the strange 
factors. Once done, the "strangenesses" or fishy things disappear; but so 
does the simple crime explanation. As in: "umbrella man" is no longer 
oddly waving the umbrella; he's sending signals - and not to Oswald 
either. It's not a fishy act; it's part of the conspiracy. There, it works 
out.
But as you point out, they - these "strangenesses" - really don't fit. 
They're just the normal oddities in life. In order to get them to fit you 
have to so alter the event that it becomes illogical and the cohesiveness 
of the narrative simply implodes. Contradictions abound - this strangeness 
is acceptable but that over there isn't and this fishy thing is good but 
it is at odds with this other fishy things and why exactly is this strange 
anyway? And the explanation becomes a mishmash of strange matters that are 
contradictory and illogical and incoherent. There's no explanation as to 
what happened; it's just a series of odd events.
As in: LBJ wanted to be president so he killed JFK; the racist DPD wanted 
to end JFK's civil rights crusade so they joined in: but oops, LBJ passed 
civil rights. The fishy stuff is explained but the narrative falls apart 
on its internal contradictions.
So all we have is this repetitive "What about this?" and "What about 
that?" And endless series of these "strangenesses". More will be coming 
with the next batch of files. And more after that. Eventually, it all ends 
because there are no more strange things to find.