Jan 1 21:21:48 EDITH kernel: BTRFS info (device dm-2): bdev /dev/mapper/sde1 errs: wr 0, rd 0, flush 0, corrupt 67, gen 0
Jan 1 21:21:48 EDITH kernel: BTRFS info (device dm-2): bdev /dev/mapper/sdc1 errs: wr 0, rd 0, flush 0, corrupt 98, gen 0
That's the start of this all. BTRFS is finding corruption. The easiest way for this to have happened is via bad RAM. Run a memtest for a couple of passes