Okay I believe everything is working properly - I was simply confused by the language in Authorize.net. When I look at my "Recurring Billing" section in Authorize and look at the subscription plan, it says this:
Subscription Duration
Start Date: 12/04/2018
End Date: 12/04/2021 or after 7 occurrence(s)
When I saw "start date," I thought that should be the start of the subscription (for example, it would be June 4th if I signed up today). But now i see this is the start of the next billing cycle.
Last question - can i change the "7 occurrences" option within CBSubs, or is that setting in Authorize?