When the original records exist I never trust the transcription or index. Too many errors. The error rate on some big sites like Ancestry has been going up as they use more non-native English speakers to index. It appears that they get little real training, especially with handwriting. It is good to remember that an index is not a source. Ancestry and FamilySearch searches bring up the indexed information. You really do have to look at the source and evaluate the original, if possible. For some records you may have to go to the beginning of a volume to find the information necessary to decode. Another good thing about checking the original records is that sometimes there is more useful information that didn't get indexed. Margin notes in church records is one of my favorite things to look for. Sometimes tell you where someone moved to (or from).
Another source of useful information that you might want to check are the unindexed records at FamilySearch for Quincy. There are a number of digitized but not indexed records there. Go to the Catalog entry under the Search pull-down and search for Quincy, Norfolk, Massachusetts. If a camera appears as an icon, it has been digitized. If there is a "?" near it is has been indexed. If a "key" is above it you have to go to a Family History Center or the Family History Library to view it (licensing terms restrict it).