Land has the unfortunate habit of tracing pictures of multiple people who look nothing alike and trying to pass it off for the same character. As a result, characters change size, shape, faces, and hair style panel-to-panel.
Wasn't there an example somewhere on the web where he used 16 very distinct women to protray Sue Storm in one issue? Often, several completely different ones appeared on the same page. Now that's funny.
This is accepted practice though, the comics industry doesn't really have any artistic or professional integrity. Which is one of the reasons so few people take it seriously as an art form. It doesn't take itself seriously, any plagerist or hack is welcome.