Yes, I had noted that also but I have no explanation. She is consistently Caroline from 1841 to her death in 1913 (I am pretty sure that is when she died) except that one time.
1841
HO107 648 11 13
Caroline Waters 20 F(emale).S(ervant).
The Rectory, Welton le Wold
Godfrey Egremont 65 clergyman N
Maria 65 N
Charlotte 35 N
Eliza Bucknall 25 FS Y
Caroline Waters 20 FS Y
Elizabeth Shaw 20 FS Y
William Headland 15 MS Y
In earlier directories, at Welton le Wold (gentry and tradesmen only listed)
Name: Caroline Burton
County: Lincolnshire
Event Type: Census
Event Date: 1861
Event Place: Welton Le Wold, Lincolnshire, England
Registration District: Louth
Residence Note: Welton Village
Gender: Female
Age: 40
Marital Status: Married
Relationship to Head of Household: Wife
Birth Year (Estimated): 1821
Birthplace: London, Middlesex
Page Number: 9
Registration Number: RG09
Piece/Folio: 2383 / 90
Affiliate Record Type: Household
Household Role Sex Age Birthplace
William Burton Head Male 46 Welton, Lincolnshire
Caroline Burton Wife Female 40 London, Middlesex
Mary Ann Burton Daughter Female 15 Welton, Lincolnshire
Moses Burton Son Male 13 Welton, Lincolnshire
Elizabeth Burton Daughter Female 11 Welton, Lincolnshire
Eliza Burton Daughter Female 8 Welton, Lincolnshire
Fanny Burton Daughter Female 6 Welton, Lincolnshire
Henry Burton Son Male 4 Welton, Lincolnshire
Charles Burton Son Male 1 Welton, Lincolnshire:
(note in 1871 Caroline was crossed out and Charlotte written over)
Charlotte Burton
England and Wales Census, 1871
Name: Charlotte Burton
Event Type: Census
Event Date: 1871
Event Place: Welton Le Wold, Lincolnshire, England
Enumeration District: 32
Gender: Female
Age: 50
Marital Status: Married
Relationship to Head of Household: Wife
Birth Year (Estimated): 1821
Birthplace: London
Entry Number: 18
Affiliate Image Identifier: GBC/1871/3404/0202
Household Role Sex Age Birthplace
William Burton Head Male 56 Welton Le Wold, Lincolnshire
Charlotte Burton Wife Female 50 London
Elizabeth Burton Daughter Female 20 Welton Le Wold, Lincolnshire
Charles Burton Son Male 11 Welton Le Wold, Lincolnshire
Emma Burton Daughter Female 9 Welton Le Wold, Lincolnshire
1872 White's Gazetteer Mrs Caroline Burton, shopkeeper
1875 PO Directory lists Mrs William Burton as a Shopkeeper in Welton le Wold
1876 Kelly's Directory Mrs William Burton, shopkeeper
England and Wales Census, 1881
Name: Caroline Burton
Event Type: Census
Event Date: 1881
Event Place: Welton-Le-Wold, Lincolnshire, England
Registration District: Louth
Residence Note: The Square
Gender: Female
Age: 60
Marital Status (Original): Widow
Occupation: Grocer
Relationship to Head of Household: Head
Birth Year (Estimated): 1821
Birthplace: London, London, Middlesex, England
Page Number: 8
Registration Number: RG11
Piece/Folio: 3263/134
Affiliate Record Type: Household
1882 White's directoryy Mrs Caroline Burton, shopkeeper
England and Wales Census, 1891
Name: Caroline Burton
Event Type: Census
Event Date: 1891
County: Lincolnshire
Parish: Welton Le Wold
Ecclesiastical Parish: WELTON LE WOLD
Registration District: Louth
Residence Note: The Square
Gender: Female
Age: 70
Marital Status: Widow
Occupation: Dressmaker
Relationship to Head of Household: Head
Birth Year (Estimated): 1821
Birthplace: Kent, England
Page Number: 3
Registration Number: RG12
Piece/Folio: 2608/ 167
1896 Mrs Caroline BURTON Dressmaker
Caroline Burton
England and Wales Census, 1901
Name: Caroline Burton
Event Type: Census
Event Date: 31 Mar 1901
Event Place: Louth, Lincolnshire, England
County: Lincolnshire
Civil Parish: Louth
Ecclesiastical Parish: St James
Sub-District: Louth
Registration District: Louth
Residence Note: Union Street
Gender: Female
Age: 80
Occupation: LIVING ON OWN MEANS
Relationship to Head of Household: Head
Birth Year (Estimated): 1821
Birthplace: Woolwich, London
Schedule Type: 140
Page Number: 20
England and Wales Census, 1911
Name: Caroline Burton
Event Type: Census
Event Date: 1911
Event Place: Louth, Louth, Lincolnshire, England
County: Lincolnshire
Parish: Louth
Sub-District: Louth
Registration District: Louth
Gender: Female
Age: 90
Marital Status (Original): WIDOW
Birth Year (Estimated): 1821
Birthplace: Woolich, Kent
Line: 1
Page: 1
Source Information:
Dwelling The Square
Census Place Welton Le Wold, Lincoln, England
Family History Library Film 1341778
Public Records Office Reference RG11
Piece / Folio 3263 / 134
Page Number 8