iTunes or other RSS/podcast reader that can retrieve whole podcast, I.E. transversing pages?
I don’t know of an app that supports this.

Perhaps you could add more than one feed:


http://venganzasdelpasado.com.ar/posts.rss
http://venganzasdelpasado.com.ar/posts.rss?page=2


And have iTunes handle it that way?

Alternatively, you could create your own RSS feed based on the website’s HTML, rather than use the one the website is offering which is limited to 5 items. That way, you could have more entries in the feed. This can be done using FeedWeaver, a free online web app.