You said those were the floor on CNFT however those ones with a time on them are auctions. Floor price would be the lowest buy-now land plot. That's for any nft too
yup correct, so when the time comes, on the site there will be an address posted, you will take this address put it in your wallet to send with an ada amount, once this is done the land will be sent back to you, pretty ez. Sadly this is how Cardano NFTs work :/