The way the carcasses are lined up in some of the shots, I could certainly see how that would make someone scratch their heads and wonder what was up. Do you know if they were moved by people after being found?
But the fact that these things are still occurring certainly takes a lost of the mystery out of the fossil finding.
That's the way the were found.
Heads towards land, tails towards water, they swam up together and stranded side-by-side, with just enough room maneuver between them.
No one knows exactly why.
Beach strandings are typically on gently sloped beaches, typically not by whales with strong echolocation ability, typically groups, speculation is disease/exhaustion/parasites though evidence is seldom found.
Some believe that animals too weak to swim try to support their weight on shallow sand to avoid drowning and become stranded with falling tide.
Some believe that the herd (pod) strands with the weak ones as mutual support.
If an individual stranded whale is refloated, it will typically swim in an arc back to the beach. No one knows if this is due to that mutual support thang, vertigo, half the body being "asleep" due to lack of circulation from the pressure of the sand, or suicidal tendencies...