It's bullshit (or I compute the addresses wrongly).
It is not bullshit, you just do not understand that for every private key there are two
formats for the public key. They are the uncompressed format and the compressed format.
From these two formats of the public key you get two different Bitcoin addresses.
Private Key: 0000000000000000000000000000000000000000000000000000000000000003
Uncompressed format of the Pubic Key (both the X and Y coordinates of the point on the elliptic curve):
04F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9388F7B0F632DE
8140FE337E62A37F3566500A99934C2231B6CB9FD7584B8E672
Bitcoin Address from the uncompressed format of the public key:
1NZUP3JAc9JkmbvmoTv7nVgZGtyJjirKV1Compressed format of the Public Key (the X coordinate only and a sign bit for the Y coordinate):
02F9308A019258C31049344F85F89D5229B531C845836F99B08601F113BCE036F9
Bitcoin Address from the compressed format of the public key:
1CUNEBjYrCn2y1SdiUMohaKUi4wpP326LbNow this will blow your mind:For every Bitcoin Address there are about 2
96 = 79,228,162,514,264,337,593,543,950,336 valid possible Public/Private key pairs!
[EDIT: fixed, I did not have my coffee before I wrote the first version of this and it was totally backwards and wrong.]
