I found an old thread on this but they didn't really solve this problem, just created a workaround that I don't like. There has to be a way to tell Event Calendar to set all the posts it creates to a crtain category (i.e. an Event category or something like that).
I was looking around in the Event Calendar files and found places where it sets its variable for posting. I even found one that was for category, but I wasn't able to make it do what I wanted. Any ideas? Like can you just tell it to $Category_ID = '12' or something like that?