Opening 2nd map yields garbage

[PsychSoftware]

Of course you got the visuals working and the very second thing I do is break it again.

1. Open Old Gridania map
2. iono tool around some? trying a quick repro now but ofc load times are prohibitive
3. Without closing out, open New Gridania map
   Result: Random mish-mash of misaligned chunks of terrain which had me very confused about what disused part of oob map data I was looking at.

Looks like the repro with less running around on f1t2 rehashed the chunks differently, and managed to place more recognizable patterns of object markers, but overall I think neither Sephiroth nor the Calamity did this intentionally.