You are on day 7 and haven't consumed any food right? If so and you are having actual BMs (not "butt pee" as many call it) then that is food that has been sitting in your bowels for quite some time.
It is possible that your prefast transit time (time it takes food to go from mouth to anus) was very slow and you are still getting food out. This is pretty unlikely by day 7 though.
Since you mentioned you are using extra cayenne and the cayenne is what breaks up mucous and other gunk, it is much more likely that this is food that was stuck to the walls of your bowels. This sludge comes off in layers (like an onion) so the less old stuff will look more normal and the color will likely darken as older sludge is detached from your bowels.