dumb dealer.
they don't have the cutter for the key, it is a special template and very expensive (like $4,500) so they likely don't have it nor will ever buy it because it is not a common request, yes it is different than the normal fob key template. all they need to do is order the key precut from Genesis.
I had the dealer try and cut mine, they f**ked it up twice, it would not work in the glovebox or door, only the trunk. finally the parts manager called into Genesis and they told him that they sold them pre-cut, I just had to provide the bill of sale as proof of ownership, the key serial is tied to the
VIN. 3 days later I had the proper key, it was $45, but so was the cut and since the dealer messed up the cut twice they "gifted" the pre-cut to me.
make sure they destroy the ones they cut if they don't give them to you, I made sure to watch him break them in half.