Where did you find this info. And is this still in the Chiquita Lake grid?
Not sure what is meant by the Chiquito Lake grid. Which maps are you looking at? As far as I can tell, Yosemite Valley is around 15 miles north and northwest of the Upper Chiquito Campground as the crow flies. It looks like her car was found around 1 mile north of the Upper Chiquito Campground.
But note that the terrain is rough and that forest roads and trails tend to be winding. That may explain the discrepancy between the distances reported from where her tent/gear were found and where the car was found. The distance may be around 2 miles as the crow flies and around 5 miles by road.
Similarly, though it may be around 14 miles as the crow flies from the car location to Yosemite, it might be much longer for a hiker who has to stick to trails which go around mountains and such. I don't yet know much about the trails & forest roads in that area.
JMO