Hm. It sounds like he has exceptional simultaneous spatial memory (hence zoo locations), but weaknesses in visual-motor sequencing. This affects skills like motor planning (mazes, placing puzzle pieces, handwriting, utensil/pencil use, even articulation, in some cases), and may explain the lower sequential memory score. Incidentally, some in the field of cognition hold that simultaneous thinkers (which this profile could be) are more math-y.
He's very young still, but I would keep an eye on the directionality and sequencing. Spelling and written expression might emerge as concerns in the future. And handwriting, of course.
