This is irritating.
I turned off the surrounding territories by replacing their boundary with a simple square. Then did all, except for the two offending cells. Removed duplicate pixels in other loops. Reduced all cells by averaging every three pixels (with an integer snap) to get rid of 'staircases'. Same Result.

Dumped their data into a separate display. Look fine. Bright light, crosses, I dont know what else to try. Note: these loops are the first in each of the associated territory's polygons.txt definition. One houses its territory center. The other does not. Doesnt seem to matter.
The reliefTiles also continue to annoy. Sparse forum posts on the subject. I'm going to try finding TripleA cache files with Neanderthal in the name and deleting them. Maybe some legacy data preventing their display.