Well thats strange but I did notice that the box looked the same. The only thing I would think is if You called spectrum labs @ urineluck.com I also don't find a QF.com. I type Your link in and it takes Me to homelandforensics. Are You sure You were talking to Spectrum Laboratories (800) 270-8142, The maker of QF? I just called after hours and they don't know the current formula because they are the answering service for orders only. I did call during the day and thats where the lab told Me that 4.0 and 4.2 both work the same and they do have 4.2. The formula order is (I believe) Quick Fix 2.0, 3.0, 4.0, 4.2