Jose wrote:
It's more correct to say that flying with another instructor (who
confuses the student) can be a problem.

Flying with =an= instructor who confuses the student is a problem,
irrespective of whether it is the original instructor or a different
one. The implication I picked up was that being exposed to a different
approach is inherently confusing; it is that with which I disagree.
Otherwise what you (and others) have said applies equally to the
original instructor as to the substitute one.

Jose

I'll be sure to look you up if I go back into flight instruction.

--
Dudley Henriques