To answer a couple of queries from earlier posts;
Marking jersey - I am very old school when it comes to marking fabric and for all internal markings I use tailor tacks. I like knowing that I can use this on any type of fabric and that I will be able to see the markings from both sides. The downside of course is that it is slower than other methods. For markings on a seamline or for ends of darts I just clip into the edge of the fabric in the seam allowance.
The waist facing - I found that this was necessary after all - as well as covering up all the pleats and giving a smooth neat finish on the inside, it gives something for the pleated skirt front to anchor to, leaving the twist part free. At least I think that is what's happening! In any case I recommend adding it in even though it seems like there are is too much fabric in the front twist already.
Back waist facing
Front waist facing