So the big issue is that the contacts, calendar entries and the gmail on my device are not syncing with the servers. Whey you look at the accounts sync screen on my device I get an error message. With the calendar specifically I will create an event on my device and it wont appear on the online version of my calendar and vice versa. This is also the method I use to help backup my phone, by the way. All of this was happening without issue prior to the upgrade to marshmallow. Now it is a really big problem.