Your clothing shows a lot of thought.
As above. The post office is your friend.
Have you tried packing all this yet? Clothes take up a lot of room. Think about the extra mass of the bags and racks required to carry them. Think about redundancy of function; get your items of clothing to do as many jobs as possible.
E.g., agree with the above. My camp cargo shorts are a pair of lightweight, quick-drying board shorts (swim trunks) with a mesh liner and a few pockets.
You'll find that even your thinnest wind-breaking jacket does the job with the proper amount of layers underneath. I'd lose all but your waterproof shell and maybe the down parka, which you can use to supplement the loft in your sleeping kit.
I see the R1 and the down sweater as redundant. I'm guessing the Uniglo packs smaller than the fleece-based R1.
I assume you'll spend most of your time in your cycling shorts. For hygiene, better to have two pair of cycling shorts (in case you don't get to wash and fully dry them nightly).
Too many pants:
Not sure what cycling pants are. If tights - then they are the equivalent of sweat pants. If pants, can they do double duty for the jeans?
Not clear what the sweat pants are for. If cold, you can wear the cycling pants under the jeans?
And think about the weight of jeans - especially when wet - and how long they take to dry. Unless this is a mandatory fashion statement, a compulsory part of the great American adventure, or an attempt to blend in with the Dakota cowboys, you might think about something a little more light weight, packable, and perhaps useable over cycling shorts, while you are on the bike. I rode in jeans and cut-off jeans in the 70s; I'm just sayin'.... (And besides, it's hard to blend in with the average cowboy wearing sandals.)
If your socks are wool, you can probably cut the number in half. Wear them out? Buy a new pair.
Think about a pair of lightweight rain shorts or cut-off el-cheapo rain pants to keep from completely soaking your shorts in a downpour.
Unless you like sunblock, think about UV protection extenders for your legs as well.
Have fun with this.