This one is a bit confusing, but I'll try my best to explain what's going on. You can't have 2 wiki pages with the same name in the same community. The logic behind this is a bit confusing though. For example, I can create ((Page 1)), then go back later and Edit the title to Page 2. Now if I try to create a new page ((Page 1)) I will be prevented from doing so because the slug ((Page 1)) is already taken. It's confusing for the user because it's not clear that ((Page 1)) already exists. If I search for Page 1 in the wiki index, it's not there because the title was subsequently changed to Page 2. So as a user, I have no idea why I'm being blocked from creating a page titled ((Page 1)). Now if I try to create a new wiki page called ((Page 2)) KARL will automatically link to the existing page that has the Page 2 (even though the URL slug for that page is 'page-1' because that was the original name of the page). So sometimes the logic relies on the URL slug and sometimes the logic relies on the title. It seems to me that we can clean up the logic on this. Right now from a user perspective it's very confusing.
I've tried to explain this as clearly as I can, but let me know if there are questions.
I'll do my best to explain, then you and Robert can talk about any policy changes going forward.
Let's introduce a new word called "name" (aka ID). The "name" of the page is the part that appears at the end of the URL. It is the unique identifier on a page, file, or any other kind of resource. It has to be unique in its container/ folder. ..in this case, the entire wiki.
We like to have names that are readable in a URL. We could make up some long, opaque thing like "X932VS2". Those though aren't useful when doing things like reading over the phone, sending by email, looking up in browser history, etc.
How do we get that original name? We could make the user provide it. But most of the time, people don't care. So we just use the title, lowercase all the words, replace spaces with dashes, and use that as the name. If there's already a name, we postpend a -1 or -2.
Now on to your complaint. It appears that you'd like changes to the "title" to lead to changes in the "name". If we did that, links would break, URLs would break, bookmarks, links in email invitations, etc.
If we allowed ((Page 1)) to be re-used, then links to the original WikiPage would go to the new one, instead of the original, newly-re-titled one.
So while we could clean up one particular mess, we'd make a mess in another area, unless we find some solutions.