He suspected that it was the Arcade VGA card. So there was nothing that they could do, as the monitor was working perfectly and within spec. We hooked it up and everything was exactly as described in this topic (squeezed on right side).
However, I was prepared and took my arcade's computer along for the ride. If I hadn't seen it with my own eyes, I would not have believed him. He did a plethora of tests on it using various game boards at different Hz (including 15Hz) and he had equipment connected that generated signals, etc.
I spent a whole day out at the Betson Headquarters in New Jersey and the tech there (Jose) was very helpful. It turns out there was nothing wrong with the Monitor itself. Sorry for the late reply, as I've been busy with the holiday fun at home.
