So I was comparing the pattern pieces...
The lining pattern piece is about 1 inch smaller across the top than the outer pieces (even after taking up the pleats!).
Again, unless I am missing something, this will be a problem when attaching the top band (which is identical for the inside and outside of the bag).
Next time I make this bag, I will just use the outer piece to make the lining as well (and then pleat the lining too). I think the lining is a little off in the rest of the measurements too, as the bottom/side piece came out just a hair short for it.
P.S. Both the lining and outer pieces are labeled upside down, so this apparently is not important (just weird

).