Research - 1855 NY census

This week's announcements from FamilySearch included the following:

U.S., New York, State Census, 1855	-		New indexed records and images collection.

Looking at database description, was excited to see Kings and New York counties
included, where I could look for the following Deckers and Koesters:

    - Decker, Margaretha, widowed, with Henry age 12, George age 7, John age 5

    - Koester, Daniel, in USA yet?, married yet?, before daughter's birth in 1858

Was especially hoping to find Margaretha and her sons, since no trace of between 
1850 and 1870 censuses.  But as with 1860 census, unable to find here either:

    - Could she have remarried, then reverted to Decker surname btw.1860-1870?

    - Could family be living with another and mis-listed under that other surname?

    - Could there be a spelling variation not covered in my wildcard searches?

    - Could there be indexing or transcription errors or omissions?  

    - Could family be living in another state? - vs. family lore in NYC whole lives?

Was also unable to locate Daniel Koester:
    - Perhaps he hasn't yet arrived in America, or New York?
    - Could there be a spelling variation not covered in my wildcard searches?
    - Could there be indexing or transcription errors or omissions?

Will need to search again further, soon!