I was setting up a meeting ( iMac, OS X El Capitan 10.1) and decided to shorten my name in the “Your info” box. I clicked in it and before I knew it I received the page “Invitations Sent”! This is a really scary glitch as I wasn’t even finished setting up my meeting. My anxiety ratcheted up in a hurry and thought I’d sent invitations to all 950 of my contacts. Whew. Now I have to go figure out how to delete this meeting.