Why is my Bitcoin receive address always different?

For privacy reasons a Bitcoin address should only be used once. If you re-use an address, anyone analysing the blockchain can clearly see that the recipient of multiple transactions is the same person. 

You can theoretically re-use a Bitcoin address but we strongly advise against doing so as it is very bad for your privacy. 

Your BitBoxApp will automatically only show you unused Bitcoin addresses and hide the ones you’ve already used. 

Whenever you want to receive coins just go on the receive page and get a new address.