Mistaken Identity

From the Comments and Cases on Partnership, 2010 Ed., by de Leon:

Page 445.

Let's simplify. Pedro sold oxen to Tonyo indirectly because Tonyo wouldn't have anything to do with Pedro. Tonyo returned the oxen upon learning of the malevolent provenance of the oxen.

Methinks that the issue should be whether Pedro has the right to retain the purchase price. On page 446 the author recovers his bearings by correctly saying no.

Page 497

Tonyo (again?) paid Pedro through Ambo, Pedro's collector. Now, who should be turning over the collection to Pedro. Tonyo? Or Ambo? You tell me.

Page 607.

Ambo borrows money from Pedro. Pedro tells Ambo that Ambo can get Pedro's horse if Pedro does not pay.

Wait a minute, I thought Ambo was the borrower.