LBS do not get reimbursed for the labor on warranty work. Usually if you aren't a jerk about it, they will do it for free though.
If you're needing your FD adjusted every couple of weeks, it's time to either find a new LBS or learn how to do it yourself. Honestly.... a FD is about the simplest thing on a bike to adjust.
Seat post slipping is a hassle, but also something that you should stay on top of or put some carbon paste on it. Sounds like they fixed that for you though.
The chainring flexibility issue has been well documented for years. That one is partially your fault for not doing the proper research. But again, it sounds like they warranted the rings for you, correct?
The Shimano warranty should cover your shifters.... so hopefully they will get taken care of too.
Lastly, a Pro SL2 isn't a $7000 bike.... just sayin'.
If you are really getting the run around, I would call the LBS that you got the bike from and see if they can help you out. Good luck!