Wow, that I've never had a problem with. Once placed they never moved. The adhesive is great. It's not the pad moving around that I have an issue with; it's the pants. There's a slight play in there and I can tell by the pad shes not always bleeding in one spot. Granted, its hardly the whole length of the pad but I like that shes covered 'in case'.I can't remember what brand I have but I did try the liners and they moved more for her than the regulars so I've stuck with regulars

I'll try the actual pads if I find she needed more absorbency. But every time I took her outside I would change it so it was changed quite often. Which is just fine. I wouldn't want to leave it on her too long.
I'll see if next time she bleeds heavier. For now it seems the extra thick padding would have been Overkill. And maybe more of a waste cost-wise if it's changed often and barely used. But I haven't really considered the cost or done any comparisons. Time and experience will tell where I go from here! And it's great to have everyone else share their experiences, ideas and suggestions!