Could there be a bug with the windows wallet? That's the only thing I am thinking might be the issue. Otherwise, I would be receiving the same rewards as everyone else.
And yes, I have a stable and static IP and a server with plenty of CPU and RAM available. I run numerous nodes on numerous servers, so the only thing unique about this particular setup for me is the wallet software itself.
The rewards are very much given out as a lottery and will average out in time please just wait a couple of days and see what your rewards are.
I have tested using a windows wallet and and Linux.