So this is a bit late, but better late than never, I suppose.
I had gotten some Qi Lan from Golden Tea House about a year ago, but when I just checked my history they had changed the listing to Qi Dan. Babelcarp has two different entries for Qi Lan and Qi Dan, but I don't know if the two are actually the same or not. At any rate, it was indeed labeled without the DHP, and it really does taste quite different from DHP.
It may have just been that they only had "Qi Lan" labels left. It would also make some sense if the two teas are made from the same bush, but then I think there's more to making a DHP than which cultivar you use. For example, Bei Dou is made from clones of the original DHP bushes, but is it's own tea AFAIK. I've also heard it said that real DHP only comes from the (very few) original DHP bushes, which is worth more than gold.