<none of the bags I've bought is anywhere close to 10 lbs>

I read the specs in the links you provided, they said they were respectively:
11 lbs 8 oz
9 lbs 11 oz
9 lbs 4 oz
Is that not correct?

I am so sorry some certain people always feel the need to be so superior & disrespectful on this forum ("dumb tourist" and "you must be joking" and so on). Some people have no manners.

@suze, you were reading the specs on the original bags I was considering, all of which I have long since rejected.

Of the three new bags (described in my blog at http://laneisgoingplaces.blogspot.co...-part-two.html), the IKEA bag is 7.5 lbs, the SwissGear bag is 6.5 lbs, and the no-name bag is I think around 5 lbs.

I apologize. I did not see that the 3 on your blog were different from the 3 linked in the OP.

7.5 and 6.5 lbs are too heavy IMO