The log suggests you are just exceeding your fuel quality with the level of boost the car is trying to push. Others will chime in.
I'm running 93 octane with WMI and pushing peak boost numbers in the 21-22 range and ignition 2-6 will typically stay in the .8-2.3 range. I'm guessing for 93 octane you would likely be better off at 1.3 or 1.4 bar tunes. Also, if you have access to e85, you could try adding 4 gallons in to the mix with your 93. On the other hand, if the car feels like it's running great, just enjoy it, in spite of the fact the ecu is retarding timing a bit.
As a reference, check out the attached log. Boost levels around 20-22 the whole pull, very few timing deviations. 35 -105mph. I only use Exxon gas by the way.