I generally get nothing but ash after a smoke; once in a while a lump of charcoal. White smoke for me is typical for a little while. But it thins out. I am sending a link that explains smoke. From your photos, it looks like you did not let the smoker run its course till there was no smoke. I suggest doing so with an empty smoker or with a dummy load of damp sand in a loaf pan to simulate a load of meat. See how long you get smoke and see if it changes over time. Will also attach photos of what I get about 10 minutes into a smoke and the results on a butt and a brisket (smoked separately).