Julie

The extra stars are kept in the vaults. If you look on the vault page there's a number at the top, under the title. The is the count of your duplicate stars that are in the vault.

After that, I'm not to sure myself. If you go under settings and select Customer Service!ND then find Album on the list it may explain more there. If not click on the red chat button. They are really good at getting back to you with any questions.