Today I received payment to an old address which was generated with previous ID. And in the email confirmation of the incoming payment to my wallet my old ID is shown. Is it normal?
Thank you.
It is perfectly normal. Whenever you back up your funds, you have backed up all the old addresses, the private keys and everything all together which would be available to you when you use the seed. The only thing that changes is the new account to access them and every other thing remains the same including your funds. Even if you have a new address, and someone sends to your old address, you should know that it is already attached to your wallet and you will still receive your funds accordingly.