My Current Problem Child, Mitering Piping on Border

Is there a better way?  This is close, and it will probably quilt out, but I spent waaaay to much time on getting this piping mitered.  I never have "regular" mitering issues, but that piping kept getting in the way.  This piping is sewn to the border strip, not the quilt top.

1. Perhaps I just wasn't neat enough? 
2. Should I remove some of the cording out of the piping in the last 3/4 inch? 
3. Or, should I have sewn the piping on the quilt top, and NOT the border strips?  ... sigh ... I will next time ... but in the meantime ...

I am a terrible "I'll do-it-myself" person (stubborn, I know) and should have sought help before struggling for more than an hour on just one miter.