Hi,
Regarding your 2nd question: all Catholic churchbooks published by Silius Radicum are duplicates produced by the priest for the local district courts (Amtsgericht / Sad Obwodowy). You can usually glean that from the title page or the certification note at the end of each book or year.
The originals are kept at the parish office, but are also available on Familysearch: https://www.familysearch.org/search/catalog/975607?availability=Family%20History%20Library
