Your answer is there... All of those "wrong" messages are likely from using non-OTS2 themes. Unless you're an advanced user, stick with only OTS2! Go to the theme's section, click "Browse List," then in the second "all" pull-down pick OTS2, and click "Go!" If one of those themes don't work, then come back here with a specific problem/question for a specific thing/theme. As it was, your question was pretty vague.