When exporting the same input video multiple times using Cloud processing in version 1.1.1, the newly downloaded file may replace a previous export instead of saving as a new file.
This happens because the app is currently using the same output file name for each cloud export from the same source file instead of appending a number to the end of the file name.
Workaround
At this time, the safest option is to move or rename your downloaded export before downloading another cloud export from the same source file.
Status
This is a confirmed bug and has been reported to the team. A fix is planned so that future exports are saved as separate files automatically.