@AshleyPotter - No I haven't. I noticed you asked this question today during the meetup. I haven't tested it yet, but I'm thinking my problem is due to the fact that a line stays associated to its original record if it is unchanged by the edit. Even if I use the Copy Lines To tool, If I don't change the lines, they aren't going to end up in the new record, so when I hit the "Show Only Active" button, those unchanged lines disappear. @JasonCamerano mentioned that today in his demonstration - he has probably said it before in his other presentations, but today was the first time I actually heard it and it made sense to me.
Jeff Ward
Summit County, Utah