Sorry you are having issues. I've had great success this month. I noticed when I took a brainjuicer survey yesterday that it would freak out if I had any other tabs open so I had to close everything to complete the survey.

I haven't noticed a time issue with how long I take to answer questions. I don't quite understand the booting after the initial screen to agree to keep things confidential. The only thing I can think of is that the survey is full. I think it just happens. Just don't take things personally, take breaks, and try again.