I have a small question for PMs
How long do they normally last before they get removed? I have a few pages that are completely blank from awhile ago.
I'm not sure what you mean. A few pages of what, search results? PM's aren't removed, they are flagged for deletion. PM content is linked to 2 separate users (sender and receiver), so the content itself needs to be preserved.
The search results can display deleted conversations. At the moment, there isn't a way to filter them out.