I realized I forgot to order last month's releases of Flip-Mat Classics. Am I right in assuming they won't be available for the free PDF if I get them into this month's subscriptions?
Correct. You have to pre-order those and have an active Maps subscription in order to get the free PDF. (In that case, I think they would have needed to be pre-ordered by August 6th or so.)
If you have any further questions or concerns, please let us know.