I don't worry about being wrong, like all humans I have faulty recall, especially when I heard these family stories huddled around a pot bell stove, rotating from front to back with all kinds of distractions, and being a kid I really did not pay much attention. IN fact I had to check with my cousin Sue, who is 9 months older than I to verify the story of Dr Sanders,and it was she who gave me the date. Apparently women pay more attention to detail and verbal history than males. in fact it was women who were the family historians in all families, it's a way of bonding and keeping the family unit together. when my grandmother died at age 94, the family fragmented and went it's own way, and there were no more reunions or get togethers, and all that history that she related is being lost.
What really interests me about the Sarah Sanders of 1820 is that Rodney Ms is (was) in Claiborne Co. There has to be some relationship between the two Sanders, then again maybe not.. Just another one of those weird coincidences you run into in research.