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Post is in further than the min insert, the one in the pic is an ALI one I had from another bike as the shop had greased the carbon post so there was no chance of that staying put, got some carbon paste on order. Haven't got a torque wrench but wouldn't want to be doing it much tighter. Have read somewhere that there is less friction when tightening if the gap in the collar is lined up with the gap in the seatpost.
Snips
I haven't actually sat on the new bike yet, but had a CAAD10 with the collar opening at the front, and no problems with post slipping, and I'm heavy. It's not higher than the Min insert line is it? Have you torqued it to 5nm? That's the carbon post, right? Try a little carbon fibre grip gel (I had some on my CAAD10 with carbon post). Clean the seatpost and inside of the seat tube with de-greaser first and make sure both are dry before applying it:
http://www.wiggle.co.uk/finish-line-fiber-grip-carbon-fibre-assembly-gel-50ml/