Thanks for posting this. I've just checked mine and you're right!
1 x FFM and 1 x Karratti via International Post today (minus the $4 discount) = $26.15
The same in my sub (again, minus the $4 discount because I didn't get it!) via International Post = $38.25!
That's a heck of a difference!
So, not only did they send my sub to the wrong address (for the second time in two years of moving), they've charged me more than $12 extra for the privilege! Good grief Penfold!