The chapter notes a difference of scope between the familiar later definition of iltifāt and the analytical treatment associated with al-Sakkākī. The better-known definition centers on shifts among first, second, and third person; the broader discussion attends to certain meaningful departures from the expected form of expression.
This is best approached as a difference in technical scope, not an automatic contradiction about the grammar of every example. One treatment draws a narrower terminological boundary; the other examines additional forms of rhetorical redirection.
For reliable analysis, state which use of the term is intended before classifying an unusual passage. The underlying rhetorical purpose is more important than applying a single label without qualification.