Well, my panties have been altered and will soon be worn again. I will report back with (fingers crossed) better news.
In addition, one of the things I did on Saturday was cut a muslin for the KwikSew 2589 camisole. Since I am in a muslin-ish mood, I figured that it's better to work out any fit issues in a cheap cotton (less than $2yd) than in my pretty silk charmeuse. The KS instructions seem incredibly straightforward and easy. So, I should be able to report back soon.