Default [Q] Encryption state

Hi, I have a problem with my phone. I tried to phone encryption OmniROM. Then I wanted to decrypt the phone, but the decryption was not possible.

According to the instructions so I did factory reset in TWRP and deleted data. TWRP but wrote that the data folder can not be found. Finally, the decryption succeeded, but now when I upload firmare based Samsung phone he wants before entering the pin code still enter the password to decrypt. I tried the password with which to encrypt my phone but it says that it is not the correct password. Can you please advise how to do a complete decryption to operate and Samsung based ROM?

With OmniROM and CM 11 phone does not need a password. I'm already confused.

Sorry for my bad english