Redlines are being retuned via the ECU due to running too rich. I'd wait until final production before buying aftermarket ECU tuners. 14% spark advance?! That's insane! WAY too much.
14% or 14 Degrees? It all depends on the car. In our Grand Prix community stock timing is around 15-16 degrees. When we bump it up, I've seen as high as 23-25 degrees advanced...not often and this is a low compression engine but I've seen it. With the Sky's MUCH higher compression (but no boost for the base model...) I'd figure your timing can't be that high. Same with the boosted R/L...on GTPs running a blower we rarely see boost numbers as high as 20 lbs...for us 10-14 is more the norm (though right now I'm somewhere above the 15 lb range...just not sure where. LOL).