Tile leveling clips - GIF

[Drew1966]

Is there a way to use them so the lifting action is minimized? Also, it looks like there's a piece of plastic left embedded in the mortar; do those cause ghosting?

I have tried them before many times and the only way I have ever found to not have tiles lifting is to not use lash clips. As to the remaining plastic foot, if you grout them correctly, the client won’t know they are there as only the foot remains.
Like most jobs, do it properly or pay a skilled professional.