Sort of Stuck??

Finally i found my grandfathers great grandparents, but like i said i am quite stuck here.So Sebastian Munoz Parents are Cipriano Munoz & Maria Munoz and i can no longer go further than that.What was is stopping me on going further is a marriage doc of a Cipriano Munoz and a Maria Asencion Munoz, it mentions that they are from el monte de los duranes but i thought they were from la jabonera?And is that Cipriano Munoz and that Maria Asencionn Munoz the same parents of my Sebastian Munoz.Can anyone give me some tips on what I can do please.How can i prove that my Cipriano Munoz and Maria Munoz the same ones on that marriage doc?

https://familysearch.org/pal:/MM9.3.1/TH-1-15697-50488-54?cc=1410092&wc=6835680