There can be any number of reasons. Usually it's an automated measure, just to make sure until staff can look at them. If it takes too long, please see the rules of this category for what to do.
You have five different projects, all of them the same game, all with extremely lazy pages (meaningless names, undescriptive descriptions, some of them without screenshots), all of them published within a few days of each other. This is a good reason for quarantining your games.
