Multiple burial records for the same person within a few years

I have noticed a a few instances, at least 5 so far, where a person has two burial records within a few years. This in Nochistlan with the first burial records occurring in the mid 1780s.

One example is below of Maria Duran widow of Lucas de Aguirre.

Why is this occurring?

05 Jun 1786
México, Zacatecas, registros parroquiales, 1605-1980," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:939N-TTZ5?cc=1804458&wc=3P9K-RMW%3A147337401%2C147337402%2C153663801 : 21 May 2014), Nochistlán > Nochistlán > Entierros 1771-1807 > image 175 of 578; paróquias Católicas, Zacatecas (Catholic Church parishes, Zacatecas).

30 Nov 1791
México, Zacatecas, registros parroquiales, 1605-1980," database with images, FamilySearch (https://familysearch.org/ark:/61903/3:1:939N-TTBF?cc=1804458&wc=3P9K-RMW%3A147337401%2C147337402%2C153663801 : 21 May 2014), Nochistlán > Nochistlán > Entierros 1771-1807 > image 240 of 578; paróquias Católicas, Zacatecas (Catholic Church parishes, Zacatecas).