Sounds like they are now using 20lb paper ,years ago Scott used a heavier stock paper.
I found the opposite problem with the HE Harris US albums. The first volume, Independence, had thinner, two-sided paper while the other ones have thicker single-sided pages.
When printing my own pages, I started out with 67lb paper but found it too heavy. Now I use 28lb. It comes in a variety of colors, however lately the prices have gone through the roof. Amazon
and the major office supply stores all sell it, so it is easy to find.