Help, please! What are we doing wrong..

[Rosa]

It's Genesis 12 mm square notched. What do you use for 600x600?

 

[Rosa]

That's how is like..

 

[LM]

That's how is like.. View attachment 97956

What type of adhesive is that you’re using?

 

[Rosa]

This one Lee, the one they have at the shop.

 

[LM]

This one Lee, the one they have at the shop. View attachment 97957

That is actually a very good adhesive and recently it’s formula has been upgraded to S1.
If sufficient notch size has been used (in this case if it appears that it is as you have 25ish ribs across a 600 tile) then poor coverage issues normally arise from an uneven substrate (which I’m assuming it’s not) but sometimes the tiles themselves may be ‘dished’.
The adhesive in your picture doesn’t appear to me to be skinned as it still appears wet. Try back skimming the tile in the same direction as the floor with a 4 or 6mm notched trowel also.

 

[Rosa]

Thanks a mil Lee
One thing, if I add say a 4 mm notched more adhesive would the lipage be too noticeable with the one that are already laid? Is there anyway to overcome that?