Hi Chris,
Interesting question!
Eventbrite Tickets does not support recurring events (and I get the impression you’re already aware of that) so the first thing I’d note is that these behaviours should really be regarded as side-effects and subject to change – as we don’t consciously ensure it works this with with every new release/change in the Eventbrite API, whereas we do of course perform regular quality assurance checks against the expected and intended functionality of the plugin.
Essentially though, at this time, a single event will be created on eventbrite.com (matching the first event in the series you created).
Does that help at all?