I’m typing on a phone now so I don’t want to reproduce your exact query; but the main problem you’ll have is that the results of one property aren’t linked to the results of the other. What I mean is you’re retrieving all results (from every computer) for Version, and all results (for every computer) for “Windows Type”.
You need to instead iterate through the computers and retrieve both results, filtering on the “Windows Type” result to limit to Servers.
@brolly33 has an excellent blog posting on how to do this efficiently; you’ll find a link to his blog posting, and what I hope are helpful tips on processing it via curl, at this thread Bes Properties that are not set or unkown causing relevance query issue
Please post back and let us know whether this helps!