Ok, I figured. The frame is quite literally 100k's old. No problem, I'll just send it back for warranty. So,, I took it apart, took a measurement of the dropout and noticed that the dropouts were nowhere near 130mm. This is odd because rear road hubs are spaced at 130mm. My cheap calipers have it at closer to 131.5mm. My really nice tape measure has it closer to 133mm. Ok I figured, that sorts it. I'll just get a replacement.
you do realize that 1.5mm is nothing right. Alot of frames from different companies are not all 130mm. there is always that +/- % in the tolerances especially with carbon fibre. I'm not saying that your frame is not defective, but no company will give you a new frame based on that. If the frame is not straight then they have to give you a new one no questions asked.
I know many people here riding nerissimo , super scuro, etc... and they all love their bikes with no problems. I even measured a super scuro with calipers and it was actually 132mm wide spacing in the back. 130 or 132 is no problem. when you close the quick release it takes up the gap. by the way the new campagnolo wheels have a 131mm spacing. I don't hear anyone complaining that it doesn't fit their 130mm rear frames...
Contact Marinoni directly, ask for Paolo which is the son of Giuseppe and the one in charge(boss). Explain him the problems your having with the handling of the frame etc... Don't make a fuss about the rear spacing as that is not a problem if the frame is straight.
I'm sure he will ask you to send him the frame so that his techs can take a look at it.