Subscriptions Page saying "Upgrades Not Available"

Currently rolling out a new membership-run paid plan on our site.

Getting an odd error about upgrades not available (screenshot attached)

Any ideas as to why this could be happening?

This particular screenshot is taken with a test account that has successfully purchased an upgraded account via paypal express.

And to answer the question ahead of time: Yes we are making customizations to the CSS to allow for us to use our own "pricing tables"