Very thorough report, and very helpful photos. A few edits, in the standard format. After revising, you're good to upload - if you can log on, which I couldn't either. Ah, the non-customer service from Yahoo! Don't forget to delete your Tests folder copy.
EDIT: You didn't include the manufacturer's name: High Sierra Sport Company. Please add a line with that information.
<<Date Of Manufacture: 2010
Place Of manufacture: China>>
Edit: For consistency, use the same case (upper or lower) for "manufacture." Also, "of" is normally lower case, even in a title.
<<As measured by tester at the US Post Office: ___ lbs (___ kg)>>
EDIT: And what did the USPS scale say?
<<In short. High Sierra provides a limited life time warranty. >>
Edit: "lifetime" is usually one word
<<I will report on how well my Camel Back reservoirs work with the Summit.>>
EDIT: CamelBak [one word; spelling only one "c"]