When Bodie realizes, maybe with some compunction, that his efforts to build a shelter and a fire have been mostly for his own good

This is true and even the writer says:

It occurs to Bodie with a faint shock that all his measures so far have been towards his own survival.

And yet Bodie's given Doyle his jacket... and the fact that he's stayed and built a shelter (when he could probably have walked on to safety) seems to contradict what the author would have us believe of Bodie, given what she writes of his thoughts.