You know, the graphics issue reminds me of how Hyper Neo Geo 64 games look on this monitor. Like a slight "vibration" effect. Since the system y2 board has a 31khz and 15 khz option, Im wondering if the graphics in this game were just designed for higher resolution monitors.
There a similar effect when you play the ps2 port of KoF XI or SamSho6 without the "soft" option in settings. Sprites look more crisp but the UI has this weird shaky effect.
I just switched out the board with MOTW and yep, crisp sprites, no vibrating or flickering. One of my speakers doesnt work, guess I immediately blew it when I went to test the sound on the UM board without the converter. Weird how it worked without it at all.