Hello Mike and thank you very much for bringing this to our attention. This definitely sounds like a bug, as NEWT is suppose to be reporting the number of CPUs that Windows sees. It appears there has been a fixed limit in our code, but we'll get this fixed for you ASAP and get you an update to try. We'll then make sure that fix is included for everyone else in the next release.
Does "Physical CPUs" and "CPU Core Type" seem correct?