The 12ngg does not show in my coinbase wallet history...I don't understand this? Only the 36ii5 address does...
Could it be 12ngg~ is one of your own addresses? Have you checked all other wallets you use?
My guess is you withdrew to your own wallet, then forwarded it to Coinbase, and forgot to do the second step when you did it again.
Note that it's always recommended to withdraw to your own wallet first, instead of sending coins from one exchange to another one. By sending it to your own wallet, you can always prove ownership of the address if it's needed later on.
The question is: do you own 12ngg~?
What do you mean? Sorry I am a noob...
I only have Kraken account and Coinbase account...I do not show any balance on either