Just because seemingly different sources agree does not mean that they have to be correct–it just means that they agree. Consider whether or not the sources are truly independent. Sometimes different “sources” have the same actual person directly or indirectly providing the information. My grandmother’s 1935 marriage record, 1994 death certificate, and 1994 obituary all provide the same place of birth for her. Grandma was essentially the informant on all three because her children provided what they were told for the death certificate and the obituary.
And all three gave places different from Grandma was actually born.
Just because Grandma was consistent does not necessarily mean that she was correct.