Tile question

[SunsetBengal]

(09-02-2016, 09:42 AM)jfkbengals Wrote: Yeah, they are filled wide, just not as deep as I expected.

That's a relief that I don't need to add more.

I was already bracing myself for a reply that I need to remove it all and start over.  That would have caused this  

Well, if the slumping lines were too much for you to bear, removing the grout and starting over would be the proper way to handle it.  But, as long as the lines are tight, no water should get under the tile and create any hydraulic pressure.  Hydraulic pressure would eventually weaken and destroy the bond between the tile and the floor.