Btw NEM wallet looks really great. Two private keys, local and remote seems to be interesting idea. I assume that local private key is only useful if we have wallet file from hard disk yep?
I'm not sure what 2 private keys you are reffering...
There is first a password for your wallet. You can have many wallets but there is rarely a need for multiple wallets if you are the only one using your computer.
Then inside your wallet there is an account (it is represented by address and an optional label) - you can have those as much as you like. When you are creating those be sure that you have written your Private key somewhere safe (especially if it is the importan account into which you are expecting to receive your stake)
You can see your Private key by choosing the option Show private key on the options cog near your address.
Make sure you have backed up your addressbook file an WALLET file. Instructions:
http://blog.nem.io/how-to-find-export-or-delete-your-wallet-and-address-book-file/And make sure you've stored them safely...
If you loose your Private key and your Wallet file - unfortunately, no one will be able to help you bring your XEM back.
Great to have you in community... Welcome!
If you have any questions and/or want to learn more - join us on official forum:
https://forum.ournem.comI go with the same username there so feel free to PM me.
Enjoy your XEM, HF and GL :-)