Mapei UC is my normal grout.. But yep, mixed it stiffer, same result. The finish was so shallow in the joint that I give it a second grouting today and its looking passable now, but not the finish I like . Safe to say ill be steering clear of Palace grouts in futureI used palace grout a long time ago I found it ok but since then I use Mapei ultracolor grout for nearly all my jobs.
Have you tried mixing it a bit stiffer?