Confuser and confuser

On page 196 of Paras' Civil Code of the Philippines Annotated, Vol. V, 2013 Edition we have this:

At first glance we think that three individuals - Sawadan, Elpidio, and Augusto - were in possession since 1908 of the land in dispute. Now the questions begin:

1. Who were these heirs of Sawadan?
2. How were they able to make a quitclaim for Augusto in favor of Elpidio?

The next paragraph makes us more flummoxed. Who was this grandmother who enabled Constante to sell the land?

Methinks that Paras intended to make the paraphrasing leave more doubts than answers to force us to go see the jurisprudence which can be found here.