Appreciate the replies. I definitely had the house inspected but of course they found no issues. I've contacted the builder and he brought in his roofer to assess the damage......sloping/design issues in one spot, poor choice of materials in the other.
What is interesting is the roofing contractor who did the roof was pulled off midway b/c of issues with the build. This new roofer that the builder uses didn't do any of the work. Everyone seems to be hush hush on what kind of problems were present during the original work and I don't know who finished it.
As far as warranty documentation, I'm in the process of contacting the original owner.
I had an independent roofer come out to my house and he basically told me that the roof sucks, was poorly done, has areas which look unfinished, some hail damage, 2 leaks, and probably needs to be replaced. His suggestion was to file a claim with my insurance and get a new roof, which he was confident would be approved. ($2,500 deductible). This is the route I'm leaning towards, but thought I would talk to a lawyer first to cover my bases.
What a mess.