The Versatility talent allows a human character to learn a talent from Disciplines other than their own.
As part of the limitations of it it states: (p120 ED First Edition)
Characters with Versatility cannot buy talents available in their own discipline.
However spell matrixes are available at multiple levels and it's an oddball in that you buy the same talent repeatedly for extra spells to store in them.
So can a human wizard use Versatility to get an extra (third) spell matrix at level one?