You probably do not mean it literally, but you were definitely not away from your device for a few seconds to rack up three violations.
Violation Breakdown (credits to @Chris_S):
To be a grade 3 and have access to the expert server, you cannot have more than 2 violations. So lets pretend you are flying and you get 3 violations. That means you recieved a warning followed by three alerts. Ultimately this means that you have had 59 seconds of warnings and messages to slow down before getting your third violation that lowers your grade.
One minute is a long time while flying to not be paying attention. I think the standards for the violations are ok in this situation.
You were away from your device for at least a minute which is why you received 3 overspeeding violations according to the data above.
You have to make sure that you are with your device and paying attention during the critical stages of your flight (takeoff, climb, descent, approach, and final) at all times as it is your responsibility. Be sure to check your auto-pilot preferences and make sure they are activated before walking away as you reach top of climb – your speed is especially important.
These violations should serve as a learning experience for you. It happens to the best of us, so don’t stress about it too much. You’ll be back in the expert server skies in no time! :)