I had the same problem with the Birra Italiano. A great drop but the keg was heady all the way through. Prior to this I had done 5 lots of Coppers Mild and had no problems so as with you assume it has something to do with the brew print ingredients. I had also only allowed to 2 weeks conditioning & still have the other keg from the batch in storage so will try again in a few weeks to see if this helps it settle down.
Other than the big head the Birra Italiano is a cracker brew. I usually only drink mid strengths so hoping that Brewart extend their current 3.5% offering as at the moment there is only the 2.