I’m happy to hear I’m not the only one having this problem, I thought it was something I messed up on!
I know for a fact that just yesterday, when I viewed the “Desktop Version” of my blog on my iPhone, it showed a perfectly resized version of my entire site. Today the site is too big for the screen and won’t resize to fit, and my background looks like someone cropped out everything except a rectangle section at the top left-hand corner.
The original poster posted the URL for her blog, I’d prefer to keep mine private if possible. If you could post again when you find the solution to her blog’s problem, explaining what the solution is, it would be appreciated. Most likely it will also be the solution to my problem.