Hi. I had the same problem and used one card only (32 Gb) SXS card on a EX1 camera. I stopped when the speaker pause and waited … but I´m not sure if the green light came on when I switched manually to the B card.
Anyhow, I used the clip browser and it looked perfect. Then I went to CS4 and tried to import and couldn´t see it. I am usinfg the SBAC-US10 external card reader from Sony ( its great)
The solution I found is to use the clip browser and export to the old .xmf file . It took some hours but it got through.
Then I imported this file into Premiere Pro ( I am using 1920 x 1080 60 i) and it went perfectly but I got the yellow line on the timeline because this file is 1440 x 1080. As I am doing a DVD after the editing, this difference is not important and I could save the speech.
I hope that somebody from Adobe read this and gives us a hint of what is happening.
Refards
Wolfgang