I didn't read the original post, but under the FAQ for Adobe, I recall that it said something about calling customer support if you go over the limit of registering 6 computers. I think if it's a legitimate reason you have more than 6 registered computers, they can go ahead and let you register more or deregister your old activations to create room. Just a guess though.
Let us know how it turns out since I'm curious about what happens after I register more than 6 computers. Since the adobe account is universal, I can see myself using up all 6 activation in my life time with new computer purchases and/or formats of current computers.