anyone had this grout and its dried light in places and dark in places not right at all

I cant help you there matey, I have never used bal for anything.

How long has it been grouted ? is it possible that it's still drying out ? and was it mixed right ?

mixed 5-1 as it said on the bag been on 3 days mate

its on porcelain tiles that havent been sealed

I will not use that colour from BAL any more, i always get shading and i have tried alsorts of methods, same result..crap.

Not all the colours do it just the limestone/black and grey in super flex... I have mentioned it a few times to a PST and got no satisfying answers..so i gave up using it.

I use Ultra colour or another i have tried lately as well is the PCI grouts..

thanks dave wont use it again

Can only agree with Dave on this!
Mind you when we used to use it, it often took just over the 3 days to fully dry out so you may be ok.
We changed to Mapei grouts - 132 Beige is a good colour.