You mean do I find it inconsistent to believe in the existence of the supernatural while typically assuming that only natural mechanisms are involved in an event? No. The supernatural is outside the realm of science--it can not be proven or disproven by science. While miraculous intervention may occur, these interventions in the Bible were generally rare and usually specific to an individual or a small area (I don't believe in a literal global Flood, for instance) and not resulting in a lasting change in the natural realm. There's no reason to think that miracles are so common as to make scientific inquiry pointless. Additionally, God often achieves his ends through natural means.
In spite of the efforts of young earth creationists to convince me I must believe God does not exist if I think evolution occurs, my switch to theistic evolution didn't really have any impact on my belief in God. However, lately for a variety of personal reasons unrelated to science I am not so sure of the existence of God.
Well, you seem a sensible sort to me but if you hang around here for a couple of threads you'll be informed that you're just fooling yourself, you're actually an atheist because only atheists accept evolution.