Is he just a normal?

[Malum Argenteum]

Ask yourself, why would anyone sell any sort of morph as normal?

Because the breeder had the possibility of normals in a clutch and simply missed seeing a morph in that one.

Because pet shops get wholesale animals that are misidentified, unidentified, labels mixed up, employees making it up as they go.

Because a casual breeder might not know quite what they're breeding genetics-wise.