Idk if they are "removed from it" whatsoever, it was found on their shelves and looks new. You have a theory which is unproven. Until it's addressed or I see something addressing the issue, I'll remain suspect of their products.
If it makes them feel better I'm usually suspect of stuff anyway until I trust the vendor, but even then I try to pay attention.
Although the employee may not be interested, which is wrong, it's not his sole responsibility to ensure what products they carry are authentic. He should have pulled the product and called attention to it, but there are superiors, people whose jobs are ordered and ensuring quality, and policies in place that are supposed to protect the consumer and their overall brand.
I might expect it from a far lesser store, but not a big store like that.