"What to think?"
I would think, "I don't know enough about what I am looking at." and look for more information about the collection of historical records I had found.
- Do I have a good understand of the how the search engine works?
What turns up in a search result is a function of how 'fuzzy' your search was. If you don't understand why something was presented to you in a search result, or why you didn't get any results when you were expecting to get something, sometimes it helps to take a step back and learn more about how the search functions work.
- Some online displays of search results can be misleading or confusing
FamilySearch vital records are displayed with a stock template which includes all the different fields one might commonly expect in a vital record. These have many fields by nature because they need to cover all the contingencies that indexers might encounter. That is, different geographical areas will include different information, but the template has to cover everyone. Researchers who are not familiar with the indexing process may not realize that, and assume that all that information should be found in every vital record, when this is not the case. Most providers have an explanation somewhere of what information is actually contained in that particular record; for FamilySearch.org, that is the The FamilySearch Research Wiki.
- Some collections have problems (known issues)
The FamilySearch Research Wiki has attached articles on problems with some collections. For example, for one of the collections of Massachusetts Marriages, the Known Issues article says:
Question #1: When searching Batch I00949-5 in this collection, I find
that the date listed for the marriage date is the same date as the
death date found in Massachusetts, Deaths, 1841-1915. Is this the
death date or the marriage date?
Answer #1: All of the marriage dates
found in Batch I00949-5 are death dates. This can be confirmed by
searching for the same person in the Massachusetts, Deaths, 1841-1915
collection and viewing the image of the actual death record.
In this case, the reason that searchers get an unexpected result is that there is actually something wrong with the data extraction, or that the information is misleading. (The difficulty may have arisen in this particular case because this is a user-submitted batch. Death certificates have information about the spouse, thus there is evidence that a person had been married, but there is no date of marriage on the death certificate. Presumably someone tried to preserve this inferred evidence.)
- What to expect from a particular collection
The wiki can also help you understand the reason the historical records were collected, and give more information about what you can expect to find in a search result.
For instance: your question is about a baptism, but if you had searched for a UK birth certificate from after 1834, I wouldn't expect an index to have an exact matching date in the index itself because the indexes report the quarter in which the birth was registered. The other thing to consider is that an index is a finding aid, so --
- Find the original records
The original records may not be available online, but that doesn't mean you have to stop there. You can look the records up in the catalog and order the microfilm. The questions How can I find out more information about the microfilms and indexes in the FHL before I order the film? and How can I find out if records in a FHL microfilm are available to view online? and their answers have some examples of how to use the catalog to determine what microfilm you might need.
- For more information, look for other finding aids and articles about the records
See the Q: How can I find out if records in a FHL microfilm are available to view online? for a discussion of the Family History Library Register describing the vital records held by the FHL for the area under investigation. Are there similar finding aids for the area you are looking in? Check the catalog. If there is a Register for that area, it will explain what records are held by the library, including indexes and records. Other local libraries and archives might have similar finding aids for their own collections that may help you understand the context of the records and the information you might expect to find in them.
Here is the relevant article. See the bolded part of this quote:
Germany Births and Baptisms (FamilySearch Historical Records)/Known Issues
Question #2: Some indexed entries have missing or incorrect
information regarding the birth date, birth place, baptism/christening
place, or film number. Is the missing/correct information available?
Answer #2: Birth/christening records that were previously viewed on
FamilySearch may not currently be available on-line. This collection
is one of three collections that were formed from a previous large
FamilySearch collection. When the new collections were published, some
of the records were omitted. This issue is being researched to
determine when and if the purged records can be recovered. Since all
of the records were extracted from microfilms that are still
available, any missing records can be located by searching the Library
Catalog and viewing the relevant films at a FamilySearch Center.
Known specifics concerning missing or incorrect information regarding
the birth date, birth place, baptism/christening place, or film number
are listed below:
The birth date and birth place may be erroneously excluded from an indexed entry.
In such cases, this information can be found on the search results page (prior to
opening the record).