It's been awhile since I've used CloneBD because of the audio sync problems. Yesterday I updated to CloneBD ver 1.0.48 and tried it again (Rip and Burn) on The Last Airbender and the audio sync problem persists. Lately I've been using AnyDVD HD, which has been very stable to rip and Magic BLU-RAY Copy. I truly wish Slysoft would resolve this audio sync issue.
Longtime/Lifetime user of Slysoft Products
its only been out a few months and actively being developped. It improved a lot since then. However you're always free to use a different tool or make your own