One wallet with different address?

When i made th wallet, from the android app i got one address which i saved. Today i bought some RVN and transferred it to my wallet. In my rush, i didn't pay attention from the generated address from the app which and after copy pasting, i noticed that it was different! Although i got my coins in my wallet, it's in a different address. I don't get it why it generates different address. Will there be a problem in the future for when i want to transfer them? Total balance is ok, it's just from different address.