Please tell me there is something I am missing here. My frustration level, not to mention my clients', is very high at the moment.
Not clear what you are trying to accomplish. Can you describe your workflow in more detail?
In my workflow, I never import audio into VideoScribe. Instead, I use VideoScribe to create video clips that I assemble with audio in a more fully featured video editor. This allows more complex audio and video effects than VideoScribe is capable of creating.
Given all of your audio codecs, you probably have other audio and perhaps video editing tools?