If the lunisolar calendar and its corresponding seventh-day Sabbath is the truth, then why didn't Ellen White keep it and teach it?

While Ellen White was given a "thus saith the Lord" that the seventh-day is the Sabbath, she never received a "thus saith the Lord" that Saturday is in actuality that seventh-day. This is not to negate her as a prophet of Yahshua, but to show that all things were not revealed to her. She said that "truth was progressive" and in light of Yahweh bringing His faithful step by step out of false religion , her statement takes on a special import. "There is no excuse for anyone in taking the position that there is no more truth to be revealed, and that all our expositions of Scripture are without an error. The fact that certain doctrines have been held as truth for many years by our people, is not a proof that our ideas are infallible. Age will not make error into truth, and truth can afford to be fair. No true doctrine will lose anything by close investigation." Councils to Writers and Editors, p. 35 In fact it is this very subject that gives credible evidence of her prophetic gift, ...  more