Looks like it should work. I would just double check when running it on tracer that the OperatorListPage.pxResults is being populated from the obj-browse.
If that looks solid, look at step 5.4 when you call the send simple email. Add a step before to set the value you are passing through as the email address on a param, so, you can see it on unnamed page on your clipboard. Make sure it is passing unique values for each loop when running on tracer.
If those two things are correct, individual email should be sending out properly unless there is an exception error or fail that tracer should pick up.