Sounds like you are having an issue that I experienced in the past. I had a number of items close to or overlapping each other and it was difficult to select the one I wanted to move. Kept selecting and moving the wrong one.
For me, the solution was to hide the elements that I did NOT want to select first, by clicking the eye icon in the timeline for each.
Then it was easy to grab and move the item that I wanted to.
Apologies if that is not what you were talking about.
Another solution would to be to select the item from the timeline rather than the canvas to be sure the right one is selected. Can then use the arrow keys on the keyboard to move it away from the bunch. Once it's on it's own should be easy enough to pick it up with the mouse.
I just got Videoscribe it seems pretty simple but it keeps grouping my items together when i try move them when I want them separate. Am I missing something or a button I'm not checking?