Was your event monitor set up with autorecording parameters? If you don't know, you should ask. You may not have to push the button at all if it's set up for autorecord. Modern recorders will call the monitoring lab intermittently and download the recordings whether they were auto or manual recordings. If you have a continuous 24hr. recorder, when you press the button, a digital marker is placed at the noted time to make analysis easy. I would not worry about how many times you press the record button.