Thank you for reporting this to us. This situation seems to be related (although not exactly the same) to the issue reported here: False multiple monitors with intel drivers
I'll send the data you have provided to the development team that is currently debugging 15.40 baseline driver.
I'll suggest checking the previously mentioned thread, since I'll be adding the latest updates there.
Thanks Ronald for clarifying. Perhaps I missed out on the original thread because the title description is misleading or not intuitive with the issue in subject here. For so long, my issue (concerning Hyper-V) is being tracked somewhere, I am fine.
Will look forward for updates to the original thread.