Yup, doing that sort of thing right now.
Got a pattern off the internet for a log cabin pattern.
It mainly tells you to look at the pictures for piecing.
Well, looking at the piecing, the number of strips and size of strips is WRONG! So, I cut MORE fabric to make up for THEIR mistake, only to stop, go back and look at what I originally cut and it's really not wrong. The PICTURE is wrong. They show putting the strips together by starting on the left, to the bottom, to the right, to the top. When in fact, if you stop and look at the strips that are cut, it is actually supposed to be put together by starting on the right, then top, then left, then bottom. Make sense??
So, now I have extra strips that will hang out in a baggie for a while. Hate that!