Major minor: at one point in the tutorial, the screen does get greyed out, even with Dolphin's broken rendering. That's a starting point to figure out why things broke.
EID 611 - the scissor region is over the screen in that case, but not in the others. Obj 232, which renders:
BP register BPMEM_SCISSOROFFSET
Scissor X offset: 171
Scissor Y offset: 171