Hey David,
Thanks for reaching out to us!
Unfortunately, this is a limitation between Tickets and the recurring events feature in Pro. As stated on our Event Tickets Plus product page:
Please note that at this time, Event Tickets PlusĀ will NOT support tickets for recurring events. Please keep this in mind before making your purchase.
The tickets created on a recurring event will apply to all instances of the event. So rather than each event having their own pool of tickets, the entire series of events will have a single, shared pool of tickets.
We are currently working on expanding this support, you can vote for the feature on our UserVoice page which will allow you to stay up-to-date with when we’ll have that feature available in our plugins.
I apologize for the inconvenience but let me know if this helps.
Thank!