RE: target tip vs broadhead flight
You have a good idea of what you're doing. Yes, do one adjustment at a time to see if things come together. The reason there are a half dozen things listed is in case one thing doesn't work then you may have to try one or all of the changes listed.
The reason they list changing bow weight first is because it's the easiest to do---and free. And often it can confirm what the target is telling you.