mmm611, I am manually clicking the next button and nothing happens. It just stays on that page. Sometimes it will progress but I get that "Bad Request" page.
As for SSI and SSI2, I usually only do SSI. If the SSI, does not credit, then sometime later in the day I will try SSI2. DH does the SSI survey and I will do the SSI2 so it's not a problem because of the same person trying the two surveys. I rarely have had an SSI survey not credit in the past. I am using the same computer and browser as I always have.