Tarry/Rusty terrain overwrote a slime bog's tiles, but not its tag?

[Former user]

seed: 01bb608a-acf8-4bbc-8bb3-1f67dc0b0128, X Y of 6, 6 from the upper left of 0,0. SW corner of the tile, there's a 'slime bog' that is a 'tarry rusty salt desert, surface'. Specifically, when I walked into the tile, it told me it was a slime bog, but it lacked any of the qualities of a slime bog, including the cloning drought. very odd