told me she was Atheist....then the next day said she was Agnostic....and then said she still goes to Church. She was confused, of course.

But yeah, in HS...they told us that Agnostics acknowledge that there's a God, but nothing else....not the Bible, don't pray to any God or worship one. The definitions I see online tend to sound more like "we don't believe there is or isn't a God, it's beyond anything we can prove." So maybe there is a bit of gray area with Agnostics as well.