SOLVED:
It is possible to combine recurring and non-recurring events with this plugin, but the documentation could stand to be updated. in the grouping tutorial, the groupby category is “recurring-id” but in my case it should have been “recurrence-id”. This seems to be the default category name. Using this I am able to get the first iteration of a recurring event correctly placed within the event order.
If other users have the same problem of combining recurring and non-recurring events, I highly recommend you try to view the raw data of the event format in order to accurately call these shortcodes.