Cabuto en Etzatlan, Jalisco

There is an dramatic change of last name on my ancestors... as I explain below:

1828- Florencio Cabuto & Damiana Lopez, Married June 25- Etzatlan, Jalisco
1827- Serapio Cabuto was baptized on Sep 9 with the Cabuto last name
1881- Serapio Cabuto & Andrea Reyes, Married June 25 (he married with the Cabuto last name)

Serapio and Andrea had 4 children, they are all baptized and registered RODRIGUEZ REYES
instead of Cabuto Reyes, so basically since 1882 my family now has the last name Rodriguez, but we should be Cabuto.

No one new this in my family, it was a big surprise. I was able to also check other descendants of Florencio Cabuto and Damiana ( Serapio's siblings) and they all carried on with the name Cabuto.

Serapio and Andrea continued to live in Etzatlan, its not like they changed names and moved away as in running from something.

I am beyond puzzled by this, and I will never know what truly happen

Has anyone had this happen to you? not a simple mistake on the last name as record keeping wasn't stellar, but a complete change??