I hope no-one else started a second part to this, if they did and I missed it I'm sorry.
I just have to do the snoopy happy dance. I finally got to Nordstrom's customer service and the dress and jacket I infamously bought in May were reduced by.....$330. Meaning that beautiful dress and jacket cost me a little more than $400, which I think is entirely reasonable.
Another heartfelt cheer for Nordstrom. They keep their promises!