The Most Challenging Sweater

I started Demi from the book, Vintage Knits by Rowan. It is easily the most complicated project I've done so far. But I'm having more problems with Shedir and the Bonita shirt from Interweave. The only problem so far with Demi, is that some of the purls are in the wrong places, but the fabric is dark and I didn't want to start over. For some reason, it always seems to take me a few rows to get the hang of the pattern. One problem was that I wasn't using some way to mark the rows or what I just did. Then I remembered highlighters. It seems dumb that I forgot about using them.
So far, with the Demi pattern I can see what the difference between the knit stitch and knit in the back loop stitch. It really stands out more when you knit through the back loop. I'm using Rowan Yorkshire Tweed and it's fairly dark, so the pattern would be really hard to see, but the pattern really pops it out. The only thing is that every single stitch for the entire sweater is part of a chart, so it will take a long time. Shedir is going okay and I decided to knit through the back loop on that also, for the same reason.