Will never buy Dulux again

I am highly dissapointed that a brand I know for years had let me down. I bought 20L weathergaurd castlewood canyon 3 months ago. I use this to touch my walls and to paint a wall i repaired. The touch went well when I bought color matches patched. 3 months later still have half a can left the blue dye of the can had mixed with paint, now i cant do touch ups and have to buy another can. Highly dissapointed, guess its time to move to another supplier when a company cant ensure the containers their products are sold is quality.