Finding a Roll Number vs Film Number

Hello friends,

How do I find a specific "Rollo" on FamilySearch. I know how to search under "film number," but someone documented a source using the Roll number and not the film number and I am trying to follow their research back.

My source says the document was at the Archivo del Arzobizpado de Guadalajara, Roll 2989, 1611-1699 and that it is a Capellania. So, I went to the films under those dates at https://familysearch.org/ark:/61903/3:1:9392-DG9H-6F?owc=3JW2-3TG%3A171…
but lo an behold there is no such roll number, the Capellania that is 1611-1699 is Roll#2986, and the one that is 1611-1854 is roll #2990, both of which are REALLY close, but are not the right number, which again is #2989.

I also looked at the Indexes that Kati Brecht has kindly put together, but I am not finding it. Maybe it has not been digitized?

Any ideas?

Thanks!

Sergio

PS Here is the link to the source I am following, p 99, footnote 20 https://books.google.com/books?id=Uc81YwxijI0C&pg=PA99&dq=D%C3%A1valos+…