Is it possible that Leia got her título of " Princess" from both her biological mother and foster mother since they both were Queens.

No. Padmé was an elected queen. After her reign ended, she went por the título "Senator Amidala" It's just a coincidence that her mother was once a queen and that she was adopted por royalty. Just like Padmé 's mother was not a queen, Padmé 's daughter would not have been a princess.
Luke's not a prince.....

The título of Princess had to come solely from her adoptive family, because the entire point of her being adopted was to keep her biological family and identity a secret