He can show us two different private keys that to the same address.
He can probably show only one key because he was just browsing the list of private keys on that site
read my previous post, this could be just his way to get people to check his site
If one private key and diffirent address. Can it possible?
not possible.
unless you were thinking 2 different addresses such as these:
Private key (WIF key): KyBfwX8shdAWRWuFGHZtdgaaCALWv2BvinLZRXreSk2x4kA9k1mW
SegWit Address: 3CesBsWnMySdEhFxBw73kQeEch5AxSDNCi
Compressed Address: 1DCGTtTohk8GncyqG2SYjNhZn2Ra92YS7g