“You are fine - it was the product which was less than satisfactory. Rack ONP390, SKU 5PTC0150 -
Anti-slip single flap toilet seat. Assembly involves use of minute grubb screws - one sneeze and they are gone - should have included a couple of spare grub screws.
Also adjustable lugs (preventing sideways movement) do not fit outside the toilet bowl (as illustrated) but inside. Instructions not clear.”
