Those frayed tail feathers aren't an indication of molt. THey typically do molt in late summer, and if they haven't already, they should be soon. I've had one go through a molt already this year, a bit early, but if one has begun, others are to follow.
Newhenstein, I really think if it was a calcium issue, it would have been resolved by now. It doesn't take days on end to see results...typically just a few, if this is the issue. I hate to sound like a wet blanket, but I think you have something more serious going on. I HOPE I am wrong, and that when she molts, it will work out...I'm so sorry!