Hi Everyone

I aim interested in buying some NVST on Counterparty DEX, but on the listing the marketcap and supply is double than what is listed on coinmarketcap.com

Counterparty DEX stats:
Marketcap: 16m
Total Supply: 30m

Coinmarketcap stats:
Marketcap: 8m
Supply: 15m

Does anyone know the reason for this?