Mistakes in patterns are very common. My LQS owner told me a very interesting story about a fabric manufacturer and their "free" quilt patterns that they have to compliment or show off a new line of fabric. One of her big spender customers who always drops a ton of money had come in and bought all the supplies needed for a quilt. She was using the quilt pattern supplied by the manufacturer. Did all the cutting, got half way threw piecing and then things began to go all wrong. No matter how she tried, the pieces were not going together. Brought things into the shop, they mulled over it for hours with the same results. She even brought it to a guild meeting and the whole group tried to work it out. Still no luck. So finally the store owner called the manufacturer with the problem. She was told that they don't make these quilts, they are published as "complimentary" and they don't make any claims of accuracy. I was shocked to hear this. The cost of all the materials to make a quilt is extremely expensive, even with a sale. These patterns are put out to promote the fabric, I would like to think that they put a little time and effort into delivering a good product. I was very disheartened when I heard this and now I look at all free patterns with hesitation. I can't afford to waste that kind of money and have such disappointment.