Each of those pages tell you:
This edit conflicted with a subsequent edit.
In practice that means: somebody started editing before you submitted your edit and they didn't require approval for their edit to go through. There are two reasons somebody might not need approval for their edit. It was their post or they have more than 2,000 reputation. A ...
When you voted to close the question, the system asked its author a question similar to this:
The author conceded that the linked question you provided did indeed solve his problem. The system - represented by the Community user - reacted to this by closing the question.
This is generally a much more expedient method of handling duplicates where the author ...
The community user will randomly bump old questions to the front page in order to attract more attention. It will only bump questions that meet certain criteria:
A question score >= 0
Gone at least 30 days with no activity
Has at least one non-deleted answer with score = 0
Has no answer with score > 0
Has no accepted answer
Is not deleted or closed
Old questions about old releases are often still applicable. Many questions or problems from years ago remain relevant today, even for the newest releases. This is mainly the case for questions with answers, but not necessarily just those considered by the system as "answered"--sometimes a good answer is overlooked by both the OP and the community.
Thus it ...
From How can Community♦ improve edit suggestions?, on Meta.SE, S.L. Barth says that:
It looks like this happens when a reviewer chooses "Improve Edit", but the reviewing user is later deleted.
These reviews still have to be credited to someone, and Community is the natural choice.
This would also be the same for Approve and Reject (plus ...
Community bumping it gets it in front of human eyeballs, which is probably the right thing to do. Think:
Cannot connect to ethernet with wired connection on Ubuntu.
I upgraded from 12.10 to the next LTS - 14.04 - so that if it gets solved, I don't have to navigate this quagmire again. Any ideas?
How would the bot parse that? ...