Water Stains on Brand New Tiles.. Pics attached

The Kurgan

Evening All,

Have tilers in doing the bathroom at the mo, they had just finished the walls and were starting on the floor tiles, polished porcelain 45x45 Bolonia Crema Glazed Polcermic...made in Spain...

Anyhow they had laid the first few tiles and a little bit of water spilled onto the floor tiles....lads dried it off and waited ..waited and waited and noticed that
even though the tiles had dried off there was visible stains around the edges of the tiles, ..8 hours later still , there, .
They opened another box and just put it under the tap just a mug full around another tile and very same result....

I've attached two pics , hopefully you can make it out , but its very noticeable as they are light cream effect.., ... Question is has anyone seen this before and would it be down to the manufacture of the tile itself..

Intending on going to supplier tomorrow

bbam

On a different note.
Some of the work looks a bit rough. Is there tile adhesive up between the tiles where the grout should be?