Hi Apothecaryrose, thanks so much for pointing this out. As to your remarks:
1. Yes, this was a typo. It should read "FG Bucket Fill".
2. Yes again, this should read "Transparent".
I've gone ahead and corrected these typos and will upload the corrected Tutorial momentarily. As to the color variation, I think the problem might be either (a), that you don't have the "Trees Outline 2" layer mask turned on for that layer, or, (b) if you do, that you might have been painting on the mask rather than the layer, or (c) you do have the mask turned on, but for some reason it is reverted, masking out the forests rather than the land. Also, given how dark the colors are compared to your last map, I'm suspicious that somewhere in your document you have an "Overlay" or "Soft Light" layer that has been turned on but for which you don't have a layer mask. Hope that is helpful.