"Are your shoes white?"
Translation:Le tue scarpe sono bianche?
It's not bad grammar, but it is a wording you'd probably never hear. Italian questions generally have the same word order as a normal statement.
Why is "le tue scarpe sono bianche?" Incorrect? That doesn't make sense. There should be two correct answers.
That should have been correct. Either you made a mistake you did not notice, or they made a booboo and it should be reported.