What year is the car, and what is the full mod list?
Also, it's much easier to view and manipulate log files if you upload them to Google Drive, enable sharing for the spreadsheet files, then post the link here.
Last thing, your throttle position is all over the place. It would be helpful if you could do a third gear pull at WOT from 2 - 6k rpm. Since the boost map is a 3D curve, using RPM (x) and Throttle Position (y) to determine the boost target (z), it's much easier to analyze if you make Throttle Position constant (at 100%). This gives you a cross-section of the boost control map in a 2D view and can be easily graphed in excel.
Once you hit peak target boost (check the map notes for what RPM that is), you will see the boost begin to see the boost taper down as you approach redline. It should not cutoff entirely. It's hard to see this in your log since you only went to 4400 rpm, but if you went clear to redline, it should be quite obvious.
Hopefully that makes some sense, and a third gear WOT datalog will be much more approachable troubleshooting-wise.