I have a Dixie too!
When you catch her starting to circle and before she actually squats, I would put her on the pad and keep putting her back on the pad if she wanders off of it all the while saying your cue word that you use for potty until she does go potty then keep saying the cue word as she is going potty and praise her. If you are really consistant she should have the hang of it within a week or two. Also, keep her on a consistant feeding and pottying schedule. Keep her crated when you can't watch her. My Dixie is three years old and she was trained to use a doggy door, which I don't have, so we have had some potty issues. I am consistant with her and take her out every three hours or so. I did notice that since I was free feeding her, because I wanted her to gain some weight, that she had more accidents than when I started scheduling her meals. Hope this helps you! Good Luck!