Hi Steph! Sorry, you're experiencing some problems at Shutterfly.
Could you explain a little more what happens? Do you mean you get an error warning that pops up on that page? Or, is it just doing something kind of wonky?
I think sometimes they have so many people on at the same time that occasionally the site doesn't work real smoothly. I would first try closing your browser and then going back again to see if it is still acting strange.
Next I would try contacting their customer service. I have a friend who has talked to them several times via email when she experienced problems and they have been responsive and helpful.
Another possibility I just thought of:
I have better luck with Shutterfly working smoothly when I use Firefox for my browser.
PS I have ordered about 10 books from them and been pleased every time, so, don't give up!

Good luck!