The Death of Lt. Joseph B. Davis~When did it Occur?

There are several reports concerning the death of Lt. Joseph B. Davis son of Benjamin Davis and Rachel Port.

Joseph was born about 1750 in Marion District, South Carolina. he married Anne Keene, daughter of  Buckingham Keene about 1783. To this union was borne eleven children's. After the birth of their eleventh child, Susan Brownfield Davis, in Anson County, North Carolina, Anne (Keene) Davis passed away about 1809 or 1810. 

Its is said that Joseph remarried to lady called Alex Whaley.  A lot of controversy surrounds this said marriage and as far as I know no Proof has been found either way. I do know that Joseph with at least 3 minors children in 1810 needed a caretaker for those children but it's possible one of the older siblings rendered that service.

In 1823 and 1825, Alex Whaley had two daughter borne of her body both given the surname Whaley. Were these girls the Daughters of Joseph B. Davis; only God knows.

Joseph B. Davis died in 1833.

1. His Find a Grave Memorial ID: 88467902 says he died on 13 November 1833.  

2. An Obituary attached to the Memorial says he died on 11 Ult (last month). Died, at his residence in Marion District, on the 11th ult. Mr. JOSEPH DAVIS, in the eighty-third year of his age. For this to be valid he had to have been born in 1750 not 1760 as stated on his FindAGrave memorial (1750 plus 83= 1833 and the attached Obituary posted has to be from a 1833 Newspaper.

3. His Rev. War Pension application (S-10534 ) says he died on 13 November 1838. https://revwarapps.org/s10534.pdf

That the said Joseph Davis, died in the District of Marion, on the 13th day of November 1838, leaving no widow but the aforesaid children, to wit Joseph Davis, William Davis, Maria Fladger, Mary Thomas & Susan B. Lyles, and this affiant, that...

If true the Obituary would have been in a December 1838 Newspaper. 

4. The New York Evening Post, Saturday, October 12, 1833; Died at residence in Marion, S.C. 11th ult., Joseph Davis in 83d yr. [ult.=last month= Joseph Davis died 11 September 1833]
https://www.ancestry.com/imageviewer/collections/50015/images/40699_2221301230_7213-00418?pId=478695

So, for death dates we have 13 Nov 1833 (FindAGrave); Obituary of the 11th from an unknown Newspaper, month & year unknown; 13 November 1838 (Rev War Pension); 11 September 1833 from the New York Times. 

His WILL was dated 12 Feb 1828; his estate was Probated on 14 Nov 1833. It is my opinion that Lt. Joseph B. Davis died on 13 November 1833 in his 83rd year.

Lt. Joseph B. Davis is my 1st Cousin 6X Removed.