At first I thought it was faults positive, but after further research it defiantly has got a problem. It explains the strange mining results, missing hash and router log activity when using it.
We are not building our own binaries anymore, this is why https://www.westhash.com/software/sgminer-5.0-final-win32.zip binary was taken from http://cryptomining-blog.com/3590-updated-windows-binary-for-the-new-sgminer-5-0/ which is a very reliable source. However, it is quite possible that there are some issues with this binary since we haven't tested it extensively. We removed this link from the download page for now, please leave a comment on the cryptomining-blog.com to let them know that this binary has issues. We recommend you to use sgminer-5.0-badman74-mod-win32.zip which is verified and even has better performance.