yes - but there are various "areas" (databases) within Familysearch
and it is important to understand that these different areas are, to a large degree, "disjoint" and separate
one area is the Family Tree where you are adding the family
another area is a database of primary records (where you found the census record)
When you do a search to add a person to a family tree it is looking to see if such a person may already exist in the family tree database
because it doesnt want to add a duplicate if the person already exists in Family Tree.
(in your case it did not find anything)
Family Tree is a database of PEOPLE (interlinked together as families)
the SEARCH Historical records area - is NOT really a database of people - rather it is a database of RECORDS.
so when you do a search before you add Lydias parents. It is not finding any matching entry - because there is no matching entry for Lydias parents as people in Family Tree (even though you did find them listed in a census record in a different part of the system.
so you need to ADD Lydia's parents in the famiy tree (they arent there now)
THEN once you add them - you can LINK them to the entry in the RECORD database (which points to a census record)
so one database is a list of PEOPLE
and another database is a list of RECORDS
and there are other databaseses such as a list of IMAGES, or a list of BOOKS, or varous other items
but when you are doing a search in Familytree and you dont find someone - it is because they are not yet in the PEOPLE database - though their name may appear on a RECORD item in the record database.
can you explain the exact steps that you are following in trying to attach them??
I went to Lydia Smith's person and went to add a parent. Then I put in James C with a 1792 Pennsylvania birth. It searched but did no find him. I then put in Hannah 1793 New Jersey birth and she was not found. I found all three on the 1850 Indiana census. Thanks, John