Great post Ladylavender!
I was very lucky with Sophie I got her when she was nine weeks old and she was potty trained in two weeks. I was the same as Ladylavender I never let her out of my sight and if I thought it was time to go potty we stayed untill she did and then gave lots of praise. She is almost two now and she still likes to be praised. Don't give up it can be done. Just be very watchful and if you think they should need to go usually they do wait it out they will eventually go. Sophie is a bigger yorkie and I have heard they are easier to train because they can hold it longer. So maybe make their potty times more frequent. Good luck.