The stock map is terrible. Personally, I'd take one of the free stage 1 maps from the OSecu forums, and tune from that.
You need to log feedback correction to check for knock. The timing pulled is learned timing, which means you knocked in that range sometime in the past, and the car learned to pull timing.
IIRC the stock target boost for the 2.5L WRX is ~11.6. Doubtful that you'll hit that in second gear, so your logged values appear to be in range.
When you feel like you know what you're doing, venture over to the OSecu forums and try out Gabedude's 06-07 WRX stage 1 map.