Oh, I love Cody Country Designs!
Last year, I did American Pride. It's an Eagle head, with the flag stitched so it looks like a reflection on it.
I don't know about extra floss, as I did it on 25 count black fabric, over one, so it was a lot smaller than the design stated.

Everything Cross Stitch only sells patterns and supplies. The designer that makes the pattern(s) is the one who makes the suggested supplies list. I have stitched patterns that have many flosses that are similar in color and combined used fewer colors by combining shades that are very close to each other. It saved a lot of time because I wasn't changing colors so often. I was happy with finished results.

I'm working on a project also from Cody Country. I'm cross stitching the U. S. Army Seal for my DH. It called for 1 skein of DMC 310 (black). When I took a second look at it, I knew 1 skein really wouldn't be enough. I put 3 skeins + a partial skein in my project bag before I started stitching. I may add another just to be sure as I still have about a quarter of it to finish stitching.
I have noticed the DMC 939 (dark Navy Blue) and 310 (Black) are very hard to tell apart, especially when stitched next to each other.
Also, there are a lot of confetti stitches. Single stitches in 1 color, the next stitch is a single stitch in a different color. You are constantly changing needles. I have a needle for each color of thread which I leave in the bobbin when I'm not using it.
Eventually I'll get it finished.

Diana