Native Mac Calendar App - Alert Problem

[Spink10]

I use the default/native Mac Calendar App with my work email address which is a google account. I only makes changes on my Mac, iPad or iPhone. Whenever I enter a new event on my Mac it has the "alert" section as "none". However after I create the event it defaults to "10 minutes before". If I go back into the event and change it and close "15 minutes before" once I close it it defaults back to "10 minutes before".

Inside Mac Calendar App - Preferences - Alerts - I have Events, All Day Events, Birthdays to "None"

So annoying for events that need no reminder or a different reminder time.

Running 10.10.3