Multiple instances, same day?

It is possible, but the interface you're showing is just to manage (e.g. reschedule) a single instance.

You can add another instance in the main edit interface, or you can make a recurring event e.g. something that would happen every 3 hours

Thanks.

By adding an another instance, do you mean setting the field to be "unlimited" and adding separate entry for that date and time? When I try that it doesn't seem to be included in the smart_date_recur logic. It also seems that you can also only set an event to repeat every X number of days, weeks, months or years. Hours is not an option.

Here's a screenshot showing what I mean.

I added an event for June 1 as two separate instances. But the second one is entirely separate in the output.

By default Smart doesn't show the ability to recur events by minutes or hours because those aren't common in popular calendar software, but you can enable them in the widget settings under the form display tab of your content type.

When using separate instances, have you tried enabling the "force chronological" setting in the formatter to see if that changes the output?

"force chronological" seems to do the trick! Screenshot below shows what it looks like

Thanks for the help.