Update:
Everything is weird.
1. I turned away from the garden. as that was mostly fixed. I then see a white layer of something, floating a block above the grass. I went over to it, and it looks like steam. I couldn't break it, and I walked through it with no harm. Again, just a thin layer of it floating.
2. I walk away from the steam, to find that . . . my bronze pipes and machines all turned into electric shunting wires (railcraft), I had 2 railcraft delta cages each with a chicken in it, my stairs to the roof and the basement were screwed up (stairs and planks in the totally wrong places), the coke oven blocks (the entire thing) all turned into steel anvils (railcraft), the torches were gone, my bed turned into fences, I had a bunch of integrated circuits in my chest, lighting glitches, diamond spikes, levers in weird places, and on and on it goes. I'll start a new world, but if possible, it would be nice to have an explanation. I can post the console log (maybe about 2/3 of it as I closed it inbetween crashes, it's absolutely huge though).
Thanks in advance for any responses!
P.S. This is probably a corrupted world file, though I'm not sure how. I didn't witness any power outages, and my computer is working fine, with no viruses, at least no detectable ones at the moment.