Yes, this is a bug. When you return the stolen car on work day 10, the work day is changed to 26.
To enable the 2nd garage event:
- Save outside the garage.
- Set variable 702 "DIAS TRABAJADOS" to 20.
- Make sure switch 750 "Repartidor Fase 3" is false or does not exist.
- Load and enter the garage. This will set switch 746 "Repartidor Fase 2" and start the 2nd event.
If it does not, this means it was already run once and the event self-switch A has been set. You'll have to set event self-swtich "90,13,A" to false. Editing the unpacked text of your save file using SaveEditOnline.com is the only way I know of doing that.