i have blockchain.info "My Wallet" wallet on iphone. i didn't pay any attention to it for about a month until a couple of days ago. when i opened the app it showed a balance of 0.00 BTC. A momentary shock. Then i noticed that the "identifier" i.e., the string of letters and numbers in the top field. This is your public key for that block. For some reason in its wisdom blockchain created a new identifier that now by default fills the identifier field, whereas my old correct identifier used to show in that field, and a positive BTC balance associated with that idedentifier showed as well. Now when I hand enter the old correct identifier, it shows my correct BTC balance.
I do not appreciate having the functionality of the app change like that without notice to me first.
Contacting support from blockchain is impossible if there is any support from blockchain.
To answer your question: hand enter your original identifier and your correct account will show. I have no idea why they change one's identifier.