this was 2013 so would be interested in what happened. I do believe whoever sold it to you was very negligent to not inform you that glass is not appropriate for flooring.

The so-called glass tiles are actually stronger than porcelain & are manufactured in a process that makes it suitable for floors. These are non-porous & rectified. In fact, they are much, much more expensive than porcelain or stone material.

I put down the 32x32 and I had a small space 950 square ft. They laid the tile regular style - not on the diagonal.