Label stores timestamp down to the second, not enough for API commands
If you're programmatically creating data in ILM (e.g. using the API), chances are that creating a label and writing data immediately after creating the label would happen at the same second. Since the time stamp the label holds is only down to the second, some data created right AFTER the label would be shown IN the label, because their time stamps are identical. Care should be taken to wait for at least a second after creating the label/baseline and then write new data.