But did it download a file or something?
No, nothing happens after confirming.
Have you already checked your email account?
There is no .aes.json file.
How did you get ahold of the PK of address 1Dv4...? Is it viewable on your blockchain.info account?
1Dv4... is visible and is in "Imported Bitcoin Addresses" (with comment "Not backed up by your Recovery Phrase. Transfer into a wallet to secure funds.")
I restored 1Dv4... in Electrum (Private Key Format: WIF).
Blockchain.info switched to HD wallets on Feb 3, 2016, are you sure you did not upgraded since there's also a possibility that you have generated the addresses from an HD wallet. Then again it seems that you have already tried importing the new seed from Settings --> Security --> Wallet Recovery Phrase --> Backup Phrase. But what do you mean they do not display imported addresses? do you mean they created addresses which you don't recognize?
I imported a new seed from blockchain.info into Jaxx, and everything went well - I see a balance from "My Bitcoin Wallet Default" and transactions, but I do not see the imported addresses, as stated in the comment.
Blockchain.info switched to HD wallets on Feb 3, 2016 and transferred all old wallets to the imported addresses forcibly. I don't remember details, because the change in the interface occurred gradually.
The problem is that address 1573vM.... disappeared. In archived and imported addresses, he was never.