Hi! Is bitaddress works correctly? Tried to check where one private key (from vanity address), and it showed the different bitcoin address.

These are the original vanity address and its private key.
Address: 1BTCyxPdP9iBgxj4FPs3KhQ8AB8rN9o1AH
Private Key: 5KY7At1DUPWtmARxaB53L5eU7QVNAaH5jzb6mZiaCCha12hN6U5

But if you put this private key to bitaddress.org (in details), it shows the different BTC address:


Bitcoin Address 1EnNMQ7eeHLsetJWtxmDpKuwfJyQLdF94b
Bitcoin Address Compressed 1hm1QFeXzT9MQx259aX4uM4Kia2e5JmZB

Public Key (130 characters [0-9A-F]):
04729B5BA07C186C053DDC518C2FA4CBC4AA6CA12D2E38264544D3EA1D4E85F1F9EDDB172AE2B2A 67BC75E2D6E92D881DD3D2CE204D753B0FF765FF3A7593248E9
Public Key (compressed, 66 characters [0-9A-F]):
03729B5BA07C186C053DDC518C2FA4CBC4AA6CA12D2E38264544D3EA1D4E85F1F9
Private Key WIF 51 characters base58, starts with a '5'
5KY7At1DUPWtmARxaB53L5eU7QVNAaH5jzb6mZiaCCha12hN6U5
Private Key WIF Compressed 52 characters base58, starts with a 'K' or 'L'
L4pJEc7x3tNwTvdAHRSqHDWNfGgCRFsyvmBWThQVWSe4f8ajCCTf

Private Key Hexadecimal Format (64 characters [0-9A-F]): E2A799386D4E83E07F87A928D49703C4E5DA65455BA096E9900068AAEA1136C3
Private Key Base64 (44 characters): 4qeZOG1Og+B/h6ko1JcDxOXaZUVboJbpkABoquoRNsM=


How is it possible bitaddress.org shows another BTC address?