We have developed an addon to synchronize Payflow recurring orders and cancellations with Paid Memberships Pro. This addon should definitely be installed if you are using the Payflow Pro gateway option in Paid Memberships Pro and have recurring subscriptions.
We plan to eventually roll this plugin into the core Paid Memberships Pro plugin, but are for now keeping this as a separate addon as we finalize development.
The plugin will add a script to WP CRON to run every night between 1AM and 6AM server time. The script checks all members against the Payflow API to see if their subscription is still active and if any new recurring orders have come in. New recurring orders are added to PMPro, and an invoice is emailed to the member. If a payment fails, the script will cancel the membership in PMPro and email the member.