I too have seen similar errors so it certainly sounds plausible that you have found the baptism record for Teodoro de Alva. It may help to expand your search to include records for Teodoro's siblings, cousins and other relatives which may provide additional substantiating facts. As to "how likely" that these are your ancestors, you may want to consider taking a genealogical autosomal DNA test which will better quantify if you are on the right track. If your Teodoro is the son of Anastasio de Alva and Mariana Gonzalez then your test results should show several matches with me. Based on what I've found, Anastasio de Alva's paternal grandparents Jose Rafael de Alva and Maria Gertrudis de Cuellar are my 5th great grand parents. On Anastasio's maternal side, his mother's (Feliciana Jaime) maternal grand parents Manuel Victoriano Gonzalez de Hermosillo and Juana Maria de los Dolores Lozano are my 5th great grand parents, and both sets of Feliciana's paternal great grand parents, Florentino Jaime & Elena de Alva Bocanegra and Joaquin de Miramontes & Maria Josefa de Trillo, are also my direct ancestors.
Buena suerte!
Austin Perez

Alba puzzle