Return the car to stock. You bought a married tuner with tunes for someone else's car "Mr. 29 year old male who is a really good mechanic". Return to stock, return the tuner to your uncle, have him unmarry it if possible and then get an actual tune put on it. Bama is absolute junk.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.