Hi, welcome and congrats on the new WRX! Same thing with me on my WRX and STi. Could be a few things:
1) The steering wheel wasn't properly centered during the last alignment
2) Tire pressure could be all out of wack
3) For a perfect alignment, you'd need to sit in the car during the procedure if you drive alone often
I've had the issue before many times. It's annoying as all hell and just like you, the wheel is off center about an inch to the right so I'm always trying to hit bumps with the wheel turned to the left to try and straighten things out (that sounds retarded I know). So yes I'd say it's completely normal but it can be fixed if the techs are careful with the steering wheel position during the alignment.