My rule (see below) seems to execute perfectly, except the logs (see below) throw an error message: Multiple simultaneous rule execution. The rule trigger is garage door opens and stays open for 15 minutes. The rule has a repeat that repeats every 15 minutes. The log error message occurs every 15 minutes.
I'm watching my garage door the entire time and see that the door is not moving, so how is there multiple simultaneous rule execution?