ok on the basis of that your throttle seems to work just fine
I have asked for the data to plot as it is very diff to read but
your N75 data varies std to mapped but that could be norm...
I can also see that for mapped this time ath the start of one run you managed 99.6% at 1900-2000 rpm for a brief moment then it dropped again then back up to 99.6% at 3800 rpm.
Either SC control some areas by altering throttle control OR you have an issue thats causing the engine to reduce load based on a problem (despite your foot being WOT)
On all previous data I would have erred on the SC side effecting ETC but having seen a 99.6% value at 2krpm for the mapped data I'm now not so sure.
At the end of the day its the angle sensor value thats being measured......if that changes (despite WOT) and the throttle works normally in std mode I can only assume at this stage to concur with whiteGTI that it appears this is how SC are modulating the way the map works
on the basis of what you have so far, Superchips should be helping you to resolve this.
other option would be to get an REVO or APR trial , then wouldnt the SC handset allow you to flash back to stock or SC mapped map that are stored in the handset.
(waits to plot data..)