I had a similar issue when I was creating window macro with separate generators for X/Y Evenly.
I see you have done almost everything. Very nice!
The problem is on Rules > Y Evenly > Extended to Side on your Generator for Y Evenly. If you turn it on you will see the difference.
To complete the Style I would do a separate Generator just for the default/Glass and use null segments to fake X/Y Evenly.
Just turn off `Extended to Side`on real Y Evenly Generator and turn it on on the fake X/Y Evenly to make it all work properly.