...I sincerely don't understand the issues others have had because I haven't experienced them....
Based on what you said in your post #16, the reason why you have not had any trouble is pretty clear to me. You have a system of doing all the right things required to use these molds successfully -- pretty much everything the rest of us are suggesting. Apparently you landed on the right methods without having to do the trial and error experiments most of the rest of us have had to do. Good for you!