I noticed that the placement of fabric "1" in the four patch is different in the line drawing and the photograph. In the drawing, fabric "1" is in the top left and bottom right. In the photo, fabric "1" is in the top right and bottom left. You can't just turn them around to be the same. I'm just wondering if it makes any difference in the pattern, when your sew all the units together.
I wondered the same thing. I did my like the photo not the drawing hope it's ok. If not I think I have enough fabric to do over but it will be close