The presented text concerns issues related to church administration in the diocese of Łódź. The author discusses the differences in the content of the documents that establish the administrative boundaries in the diocese of Łódź, as well as the discrepancies between the date of the bull of establishment and the date of the document appointing the vicar general of the same diocese. The author's aim is to explain these differences, using documents and materials found in the Vatican Archives, especially in the Archives of the Congregation for Bishops. The text focuses on a detailed analysis or study of the differences mentioned, probably in a scientific or ecclesiastical context.