Hello, Kevin!
Thank you for using The Events Calendar! I can help with this ?
You are totally correct that in the past the version numbers should match, but as of 4.5 of The Events Calendar that will no longer be true. You can read a bit more about ‘why’ in this blog post: https://theeventscalendar.com/release-the-events-calendar-4-5/
The short story is that we’re not going to be updating each plugin with each release so there will inevitably be version mismatch in the numbering. Not to worry, we think this will improve things across the board!
Does this help answer your question?
Cheers,
Trisha