Are you saying you can still remove the grout? The only way grout should be removed is by grout saw or dremmel tool if you can take the grout out with finger- or fingernail then that's no good.
My guess is you used a polymer grout as oppose to regular grout and your having a reaction. Imo unsanded grout shoudnt need sealing its the porous things in life that should or can technically be sealed.
I'd bet doughnuts that its not water related as well. I'm not a fan of T moldings, I would of ran it the other way and taken the base molding off, that right there shows you mr. jimmy cut corners cut so many corners he did a complete circle and ended up nowhere but were he started. Lol
That's the 7mm HD end rack for like 89 cense a Sqr ft. I can't tell looks like the hallway wasn't staggered.
You can't have that long of a run in that direction because it ends up to be so long that the expsnstion process happeneds before it can reach the ends at the walls. Offsetting the seams...
My grandparents are retired but live in phoenix. That's funny there is nothing but strip malls at every traffic light way to busy for me but nice to visit.
We're the boxes sat to acclimate in the room your installing? If they came straight from the boat God only know what conditions they have been through.....