I had the same problem with IE. Was able to get to the step RIGHT BEFORE putting CC info in then it went to an error screen, multiple times. Went on my iPhone, used Safari and had 0 problems. Everything went right thru. No errors or anything.
I was able to do IE 10 without issues. Maybe you are using diff version?
I had problems when they opened a week ago with firefox so I figured id stick with IE and just "hurry" my way thru the line.
I couldn't believe the large bottles were still in stock this time! I got a 6 ml and 18 ml last time. Been savoring since. Hopefully USPS doesn't send my package to wrong place again or ill be out.
Now I can get away from pc and back to work....oh wait...I guess that still involves pc ... dammit. Well at least maybe I can pay attention now to what I was doing