I am using ver 2.9.5 (290502) from PlayStore
And, if the 1st account is newly created, I will not have any method to restore from seed.
I think it could be a bug, but I am not sure.
As I said, the 2nd account should be visible with all your BTC in it after you click on add an HD Account. There isn't different seed for account 1 and account 2, both of them should had been recovered with the 1st seed.
If you are saying that it didn't ask for the seed even during the first start then it can be a bug. There is no option to enter seed after you have created a new account, you need to again reinstall the app to get the first screen where it asks for the seed.