Did you printed the generated addresses/keys on the first ?
I would tell you to just test generating the addresses from the private Keys on a saved
https://bitaddress.org/ .html offline version and look if you get the sames
-snip-
I tried simply saving the bitaddress.org page, and it still generated keys correctly for me. The most likely culprit here is OP's wallet is generating a P2SH or P2WPKH address instead of a P2PKH, or he has used the wrong one of the compressed/uncompressed key.
It's surely that !
