Orr’s original date was not wrong.

He correctly identified the stratum as terminal Pleistocene based on the geological context and reported the charcoal dates accurately.

The AMS dates from collagen were not available in 1962, not because anyone failed to apply them, but because AMS radiocarbon dating did not exist in 1962.

Using the tools available in 1962 produced the best date that 1962 science could produce.

Using the tools available in 1999 produced a better date.