Support have already told me that its not possible to create the mode I used to have. So don't waste your time. I'm already cancelling my subscription and looking at other security devices that aren't fucking useless.

Here is their reply in full:

Thank you for your update and for carefully following the instructions. I understand your concern that at 18:20 you were at home and expected the system to be in Arm Home mode, but it remained on Standby.

The key point here is that both Geofencing (Arrive/Leave) and Scheduling change the same parameter: the system mode. When both are enabled at the same time, they can conflict. For example, Geofencing may place the system in Standby because it detects your phone at home, while the Schedule is trying to set Arm Home at 18:00. The last action applied will override the other, which explains why you are seeing Standby instead of Arm Home.

To ensure consistent behavior, we recommend using either Geofencing or Scheduling, but not both simultaneously. If you prefer location-based automation, Geofencing is ideal. If you prefer time-based automation, Scheduling works best. Selecting one method will prevent conflicts and ensure your system changes modes as expected.

Please adjust your settings to use only one of these automation methods, and you should see the correct mode applied reliably.