Are you sure of your BIP 32 implementation? Or am I missing something particular?

My test wallet.dat file shows:

extended private masterkey: xprv9s21ZrQH143K4Wv2JLdfN8td2qVm8qTU7c7hD36gSfsnfNp7AjjgcaGiem5v7KvJnmpee8JeciN8dGvK5r2KZtEt8N4hgnQ3kRP6mQp2JVL

KyruVb9pCVBtxHvof6VrxB7GNk7fmqeSh1wFNwjubyuo4BJLfywz 2016-09-05T11:11:48Z hdmaster=1 # addr=1Dk8v9pw3eAC1uXrQd2PhSwAq7pQr3VUs9 hdkeypath=m

So master seed private key should be: 0bfe13930513cf7ad70bb34161f758417df200d6393e2301d49aa92a9cb6f777

But KyruVb9pCVBtxHvof6VrxB7GNk7fmqeSh1wFNwjubyuo4BJLfywz corresponds to 4ecf2e71d567072fe2f9cda40873afcaae4224e3f249018621a90dd43e88f8de (+01)

Even if hdmaster was finally m/0 (because I don't really see the point of including the master private key in the file and twice) then it should be c9065bdee993a97d148f36ccba46644f67e4572a25a149b02d59bc73a3a1b543