I think this is all part of presenting the results of your research, obtaining new information, which may or may not be supporting your earlier findings and conclusions.
The same applies for (serious) scientific research; one may put forward a certain theory, but that has to be viewed from all angles and all evidence must be evaluated, supporting or contradicting the theory. The true power lays in the fact to not stubbornly keeping to earlier conclusions, but being able to acknowledge other information that does not support your earlier findings, thus requiring an update to one's study.
I wish all scientists were so inclined to admit that earlier conclusions are no longer aoolicable, since other evidence has come available.