I just signed to take the Comptia A+ OS/Hardware Tests. But when I was signing up for them, I noticed that the only one that I could sign up for was the "Comptia A+ Linear OS/Hardware" tests. With the tests numbers being 220-301/220-302 vice 220-221/220-222. Did I just sign up for the wrong tests? Are are those in fact the same tests and more importantly, I can us the same materials I have to study for them?