I set my auto-pit to 1s, and my auto track call (ATC) is usually 2s, so I've not seen this happen.
I can't test at the moment, but if ATC kicks in while a car is in the pit lane, no matter the time, then that needs to be changed. I should be able to pull into the pit lane (with sensor) and take the car off the track to work on it, without triggering a track call. I'm sure there are other scenarios where this would be useful, and can't think of any where you'd want ATC in the pit lane. Manual track call, maybe, in order to help someone else who came out and didn't realize it or doesn't know what to do.