2000 Iceland 1000 Kronur [Risolto]

Why Iceland 1000 Kronur year of 2000 listed under United States currency?

I understand that it was produced and sold by US Mint along with US 2000 Leif Ericson silver dollar, but certificate for the Icelandic version states "These coins have been produced by the Department of the Treasury, United State Mint in conjunction with the simultaneous minting and issuance of a commemorative coins on behalf of the Republic of Iceland in commemoration of the millennium of the discovery of the World by Leif Ericson. The U.S. coin is legal tender of the United States. The Icelandic coin is legal tender of Iceland."

The set box two coins came in bears Central Bank of Iceland as well as US Mint logos.

I think this coin would be listed under Iceland coins with note that it was minted in Philadelphia, US. Interestedly mint mark is missing on the Icelandic coin.

I am missing something here? Or do I have US coin of 1000 Korun?