Could the clips be warped or bent? I've taken calipers apart and had them fall out in pieces from having broken from the heat and stress. Or maybe you've just got some defective clips or pads???
If they look ok, maybe try polishing the edges of em with fine sandpaper or a dremel.
Some manuals say you should replace them every time you replace pads but I usually re-use them.
Don't know if there are rights and lefts or inners and outers on this model.
By the way, whenever I've installed new pads or worked on caliper brakes for any reason, I always seem to find that the wheel doesn't want to turn freely by hand untill I've driven a bit and used the brakes a number of times. Sort of a break in period I guess you'd say.