It sounds like the hub mode isn’t changing? You can’t “reorder” the action manually but you can it while recreating the automation, it’s basically ordered by what you add first. So you can try that.
If the mode still isn’t changing I would recommend report it to support@smartthings.com (I’ve seen this happen a few times typically when the platform is undergoing maintenance or having an outage).
If the mode is changing (you can verify this from the new ST app under Manage Location), then the SmartApp may be having an issue. You can try looking at other SmartApps with which offer similar functionality to “hold” the temperature setpoints for the duration of a schedule or hub mode, here are two examples: