i'm used to the .ca website, which I find just peachy. I've been on the .com lately just for fun, and yes, I find it confusing as hell! I'm a wannabe / not-really-by-choice web designer, and I agree, there is a ton of room for improvements...
I must say though, not as bad as Chev / Dodge Build & Price. I haven't yet managed to build a truck the way I would want it without guessing at every click.