Yes but what is being said here is that after giving a statement that "action packs" comics is canon duncan contradicted himself later on by saying comics are "generally non canon and etc, etc.."
This is being argued as contradiction to the declaration of "Action pack comic" in particular as canon.
Also that old statement of two staff writers MC duffie and charlotte (his wife) that "nothing outside of show is canon" as well is a another contradiction (this statement existed since far before and is well known by everyone, no one takes it seriously is another thing, but we still have profiles with various merchandise and games that has been taken as canon, the power needed to implement statement that affects the verse on this scale goes outside of jurisdiction of mere 2 staff writers out of 19+). On the other hand, Duncan is creater, Right holders and one with more power on overall ben 10.