Why do I get two different private keys for the same BTC address?

C:\bitcrack>test -u  -i taddress.txt
[2019-05-18.18:30:32] [Info] Compression: uncompressed
[2019-05-18.18:30:32] [Info] Starting at: 0000000000000000000000000000000000000000000000000000000000000001
[2019-05-18.18:30:32] [Info] Ending at:   FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140
[2019-05-18.18:30:32] [Info] Counting by: 0000000000000000000000000000000000000000000000000000000000000001
[2019-05-18.18:30:32] [Info] Initializing GeForce GTX 1050
[2019-05-18.18:30:32] [Info] Generating 262,144 starting points (10.0MB)
[2019-05-18.18:30:33] [Info] 10.0%
[2019-05-18.18:30:33] [Info] 20.0%
[2019-05-18.18:30:33] [Info] 30.0%
[2019-05-18.18:30:33] [Info] 40.0%
[2019-05-18.18:30:33] [Info] 50.0%
[2019-05-18.18:30:33] [Info] 60.0%
[2019-05-18.18:30:33] [Info] 70.0%
[2019-05-18.18:30:33] [Info] 80.0%
[2019-05-18.18:30:34] [Info] 90.0%
[2019-05-18.18:30:34] [Info] 100.0%
[2019-05-18.18:30:34] [Info] Done
[2019-05-18.18:30:34] [Info] Loading addresses from 'taddress.txt'
[2019-05-18.18:30:34] [Info] 1 addresses loaded (0.0MB)
[2019-05-18.18:30:34] [Info] Address:     1KWj99Jwd9LGGC2Y1c9c4cmvWvYTQrLFVc
                             Private key: 0000000000000000000000000000000000000000000000000000000220082201
                             Compressed:  no
                             Public key:
                             6A245BF6DC698504C89A20CFDED60853152B695336C28063B61C65CBD269E6B4
                             E022CF42C2BD4A708B3F5126F16A24AD8B33BA48D0423B6EFD5E6348100D8A82



C:\bitcrack>cubitcrack -u --keyspace 1e -i taddress.txt
[2019-05-18.18:16:36] [Info] Compression: uncompressed
[2019-05-18.18:16:36] [Info] Starting at: 000000000000000000000000000000000000000000000000000000000000001E
[2019-05-18.18:16:36] [Info] Ending at:   FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364140
[2019-05-18.18:16:36] [Info] Counting by: 0000000000000000000000000000000000000000000000000000000000000001
[2019-05-18.18:16:36] [Info] Initializing
[2019-05-18.18:16:36] [Info] Generating 262,144 starting points (10.0MB)
[2019-05-18.18:16:36] [Info] 10.0%
[2019-05-18.18:16:36] [Info] 20.0%
[2019-05-18.18:16:36] [Info] 30.0%
[2019-05-18.18:16:36] [Info] 40.0%
[2019-05-18.18:16:36] [Info] 50.0%
[2019-05-18.18:16:37] [Info] 60.0%
[2019-05-18.18:16:37] [Info] 70.0%
[2019-05-18.18:16:37] [Info] 80.0%
[2019-05-18.18:16:37] [Info] 90.0%
[2019-05-18.18:16:37] [Info] 100.0%
[2019-05-18.18:16:37] [Info] Done
[2019-05-18.18:16:37] [Info] Loading addresses from 'taddress.txt'
[2019-05-18.18:16:37] [Info] 1 addresses loaded (0.0MB)
[2019-05-18.18:16:37] [Info] Address:     1KWj99Jwd9LGGC2Y1c9c4cmvWvYTQrLFVc
                             Private key: 000000000000000000000000000000000000000000000000000000000000001F
                             Compressed:  no
                             Public key:
                             6A245BF6DC698504C89A20CFDED60853152B695336C28063B61C65CBD269E6B4
                             E022CF42C2BD4A708B3F5126F16A24AD8B33BA48D0423B6EFD5E6348100D8A82