This doesn't seem strange to me at all. Are there things you disagree on but never say? If so why don't express it - why are you keeping it to yourself? If you do this what does it say about you feel about yourself and your own views? Perhaps she is trying to encourage you to express yourself it isn't natural that you would agree on everything, relationships aren't like this, and how do you handle this in other relationships?

I disagree with my T often.