Your BlushDrop editor generally edits the clips in chronological order.
Remember, you're charged per minute of video above the included 10 minute capacity. You can save a bit of money by not including clips you don't want to use.
If a guest uploads a 10 minute clip but you only want BlushDrop editors to use 10 seconds of it, feel free to use a video trimming application to cut away the extra footage.
Or just leave it all for your BlushDrop editors to sort out, along with a message to your support email provided when you sign up.