Questionable medical detail

Rating: Null/10 (10 September 2011)

This may be a spoiler for you, so read no further unless you have seen the film and can understand what I am talking about. Typically, a patient with a head injury and memory loss has primarily short-term memory loss, while retaining long-term (which is how he knows him name, for instance, and whether he is actually married). This man's memory loss is the opposite - he knows his (phony) name, insists that he is married to his fellow spy, which he is not, but does not remember what his real occupation is and the bad things he has done in the past. Works for the plot, but is medically inaccurate. I also question why his journal, which must have been in his pocket when he went into the river, looks only slightly water-damaged, and the ink isn't smudged at all. Please!