Cathy, it was probably an isabella (Otherwise known as fawn) and tan. Lilac isn't a recognized term in the breed. Isabellas and blues are dilutes, and therefore can have many skin/coat problems (alopecia) just like dilute Dobermans and other breeds with dilute colours. They are pretty rare for the above reason.
Here's a web page with the different colours and coats Dachshunds come in:
http://www.keystonekennelusa.com/Min_Dach_Color.html
Though I'd highly recommend to anyone to stay as far away from that kennel as possible if they're looking for a pup..
Cass, a lot of the Doxies in that link are beautiful. I hope my (a loong time from now) next is a longhair. :)
I probably did read your posts about them a while ago, but I read so many threads and just forgot. That makes sense though. I'm so sorry about your's. That's terrible. Luckily there doesn't seem to be too big of a problem like that around here. As far as I know though most blind pies seem to have a double dapple somewhere way back in their line, though I could be mistaken. It's been a while since I've read much about Dachsie colours and genetics and such.