This is also another example of the need to read the direction first. Quite often the pattern makers/writers do make mistakes. I've often rewritten the instructions for myself for that very reason.
Just finished a quilt and the nationally publlished well known quilt designer wrote to press seams open. I got some fabric I didn't need from my stash and made some practice blocks. Sure enough, the seams could be pressed to the side, all to the same color, and they the seams all nested perfectly. Since I don't like to use pins when sewing it made the process more fun for me.