Best Tune Advicef!!!!

[Capricious]

I purchased a 2012 Dodge Challenger RT/Plus a year ago. They said the car had been on the lot less than a week. The previous owner added a CAI, Borla Duel Exhaust, Removed CConverter, New Headers and a Diablo T1000 tune. I didn't know half of this at the purchase time. Anyway I just loved the way the car drove and the sound. 7mths later they decided to flash back to factory during an oil change. It hasn't run right since that time. There this loud noise between shifts if I'm moving at a cruising pace lets say from 0 to 45. There is also this drag as I seem to already be in a high gear when I really get on it as before it seemed like I was in a lower gear so when I hit the gas I could feel it move. Since this time the dealership had it performance tune but I still notice this drag and slight noise. So I've come to the conclusion the shift points could be off. Am I correct in this thinking? Since then I've been able to track down the T1000 that was married to the car, but I had to have it reset. What's the best advice to get the car to where I like it? Should I just pay for a professional tune and sit with them until I get it how I like it or Can I do it with this T1000? Please my car has been in this state for 3mths and I'm loosing my mind looking for the ride I had before.

[Rhildreth2013]

Is the ECO mode kicking on? That will make it feel like it is dragging its feet under light acceleration.