Thats a great help. Another thing when i create a new wallet why it is saying "recommended" on the 12-word passphrase? Isn't the 24-word passphrase is more secure and shouldn't they recommend that 
or it is better to to create 12 words recovery phrase along with an extended passphrase?
The recommendation is not for a passphrase. It's for the seed/recovery phrase. 12-word seed phrases provide you with 128 bits of entropy. 24-word seed phrases give you 256 bits on entropy. It's easy to see that the security is greater with the latter. However, bitcoin private keys only have 128 bits of entropy. If those ever become vulnerable, Bitcoin is already doomed to fail despite some wallets providing 256 bits on entropy. or it is better to to create 12 words recovery phrase along with an extended passphrase?