It can be really hard to find anything in the feedback area, so there tend to be duplicates.
It's often not clear exactly what's wrong at the start, so the feedback titles may not be super-helpful. Unfortunately, it's impossible for us citizen-scientists to change a feedback title.
(Citizen-scientists can also be a little inconsistent in describing problems, but you can always add more detail in a comment.)
We can also change the topic, type, and status of a feedback.
The topic and type relate to the tabs you see across the top of the main feedback page. But it gets a little muddy, since there's a "crash/hang" topic, but there's also a "bug" type. There's no "crash/hang" tab, but there is a "bug" tab. I'm actually not sure where feedbacks with a "crash/hang" topic go, tab-wise. I generally use the default "open" tab.
Along those lines, I've been closing out a few feedbacks, especially those related to the current devprev release. I'd like to see the "open" tab displaying more relevant feedbacks in the first two or three pages.
Part of the problem is that we went through a long period of extremely limited developer resources, with some problems lasting a long time. This has improved lately, so we're seeing more feedbacks being answered, old problems getting fixed, and new features getting added.
The devs don't close out feedbacks (which is good), so it's up to us. You can review your own feedbacks using the "cases" link (confusing that) on "My Page". Closing out the old and stale ones won't hurt, just add a comment and change the status dropdown to "closed".