I don't think you made a mistake. I think you did the right thing. This stock is stuck in a 1999 time warp, and I believe it will end badly. The $649 to $519 thing may be a joke, but it really is not so funny. Didn't they sell Aeron chairs for $900? It's the way of the world, and I cannot see how MLHR will be making the profits to justify the current market capitalization.
Miller does have the Sit-On-It and OFS/First Office alliance to provide guaranteed distribution of mid-market brands to it's dealers. Herman Miller is definitely in a better position than Steelcase but can't hold a candle to Haworth these days.
Neocon was down 30% by my guess, but I could be wrong. Alot of my friends didn't make it.