Yep, the guys are right on this... check for vacuum leaks AND possibly fuel pressure. Your pump could also be going weak and not keeping up with demand (or clogged fuel filter), thus causing the ECU to trim the fuel positive. When you test fuel pressure at idle, crimp the return fuel hose and see if the pressure goes up. If it doesn't, then you have a pump/filter issue.
As for the ECT readings, I use a similar logging software and had to up the sample rate to keep it steady...either that or the ECT sensor is going out?
As for the readings that say NO DATA, you're fine.. those settings aren't available for our cars.