Let's reread what you posted:
The police report doesn't rehabilitate the testimony just because it says the same thing. If the cop testifies to something, and then the defense suggests that, for example, this is a recent fabrication, the police report can come in to show that the cop isn't changing his story, he's been saying this from day one. But if the cop testifies to something, and the defense suggests that he has a motivation to lie that existed all along, then the police report proves nothing at all, and wouldn't be admissible for rehabilitation or anything.
1) The police report would be admissible to a grand jury
2) The hilited portion is a way for the report to come in, and mostly likely would have occurred.
3) Now that we have audio tapes of the incident, the report is moot.