Double straps on your panniers, wow. I only use one per. Must be reckless.
Do they charge you for the picture?
Double straps because those weird little locks on the top don't.
There is also one going across tying the two together as an added security measure just in case the seatbelt clasp breaks.
Yes, they have a website that you view the shots and order what size and number you want as a hard copy.
Not sure how I was able to download it but this is the only one of the 8 I was able to do that with.