Yeah, recently DNA samples showed that we are not directly decended from Neanderthals. Add in the very old Homo sapiens fossils in Kenya, and H. sap. has been round far longer than we thought, and lived at the same time as H. nea. If there was interbreeding, there is no genetic trace of it in modern man.
New evidence, and the theories change to remain true to the evidence. Best guesses, yes, sometimes so pretty damn sure there's no point in doubting it, but sometimes best guesses.
A different paradigm to one where new evidence requires interpretation to remain in line with an unalterable theory.
One pradigm is the evidence changes, the 'facts' change.
The other is the evdience changes, but the 'facts' remain the same.
Each to their own.