Tile roof has water running under tiles
Found a handyman with roof tile experience; he put new tar paper under the tiles (3' wide);  but it still leaked during a water hose test!  He then added some drip edging at the gutters (again, 3' wide) and opened an end flap under the tile adjoining the wall;  the dripping stopped with all water caught into the gutter.  And we had a deluge within the week and it worked; cost $700.

And he put those broken-in-half tiles back into the channel saying they are levelers!  His only advice for the open roof tiles was stuffing steel wool into the humps!  Go figure.  The endings of the humps at the edge of the roof are all blocked by tin , so why not the those open humps on the upper?