That's one of the reasons I left vittoria aside long time ago, the darn hump in some models is just ridiculous. In my experience there is nothing much to do, I have had the same situation than u several times and after 25+ years using tubulars no clue if there is a cure for that.
By the way how much air are u putting to the tubbies??? if this is your 1st time using them and if you are comming from clinchers the 1st bad custom is to put the max air to what the tubular says and that could be some of the problem, never go over 110 or 120... 95 to 100 is like ok. Try with 80 pounds and go riding down the block.