Yeah stop driving it like that it needs to be dialed in. It may not just be the tune either.
And use linearwb if the logged value is different from what the gauge displays. You enter user defined voltages to get them to match. But you need to have that tune dialed in better before you can setup linearwb correctly since you have to force a rich and lean condition to get the voltage values your going to need.
http://youtu.be/k3BIR6OOphg
^but before worrying about this fix your car