paper wallet inconsistencies

[redrider]

 I encrypted a paper with bip38 using bitaddress.org.  I then tried to decrpyt it with namecoinia.org and bip38 selected and it kept saying my passphrase was invalid.  i went back to bitaddress.org and it decrypted just fine.  I took that private key and put it in nameconia.org and it gave me details matching what bitadress said.  It makes me leery that it wouldn't decrypt so im skeptical about using.  I'm wondering the safest way to store namecoins while still being able to retrieve them later.