I'm new to Aquamail and, in fact, Android. When i get calendar invites sometimes they seem to add to my calendar and sometimes they don't. When I open/accept the invite, there is a box at the bottom that you can check that says "add to calendar if accepted"; when I check it, it shows up on calendar . But other times the box is grayed out and it says "already added to calendar" and I don't have the option of checking it; when that happens the invite doesn't show up on calendar. I asked the sender and they aren't doing anything different when they send the invite. What makes that box grayed out on some of the invites? They all default to gmail calendar. Thanks in advance.