I don't know why, but whenever I open any Worlds Version I can't add new objects correctly. Let me expound. I either copy and paste, or drag and drop some sort of an object like a spring, but when I test the level, it doesn't work. However there are springs of the exact same type in the level that do work. Some times one or two objects will work correctly, but the rest you can just pass through. Any ideas of what's going on?