At idle and low load, it's going to hover around 14.7:1.
On tip in, it might enrichen (or briefly skew lean), then move towards target (depends on load -- richer at moderate to high load).
On throttle lift, fuel will cut, so it will read lean on coast down, returning to stoich as you approach idle.
Anyway, unless you have changed the diameter of the MAF tubes from OEM, or have a sensor issue or vacuum leak, it should trim (without issue) to various targets in ECU fueling map, depending on load, air temps, oil temps, etc.
When trims get too high, you'll get a CEL.
EDIT: Everything you posted looks normal...
Pick up this book
http://www.amazon.com/Engine-Managem.../dp/1932494421
You will learn a LOT about tuning and be much more able to interpret sensor data
