Please provide the below information:
1) Please click Help-Check for Updates to make sure you are using the latest version.
2) Did you get the out of sync problem when you play the input videos for preivew in our software?
3) Please right click the file list on Leawo to send us the bug reporter, then inform us here.
4) Please find a smaller file which get the problem to send us. You can upload it to https://skydrive.live.com
, account: email@example.com
Please inform us here or email/support (if you contacted) to follow-up.