I wrote to the etsy shop that I bought all the fabric from and the owner (Sylvi Sealy at sewcolorquilts) said that one lady had cut those strips just 5 days before the corrections came out and she had to cut everything else smaller, too. I feel more sorry for her as I don't think I'll have to shrink everything. That fabric cost me over $200 bucks as I bought enough to increase the quilt to queen-sized :P

I'll practice with some scrap fabric like you folks suggested! I am so relieved I haven't started sewing yet or I really would feel sick...