1. HAAS is the group that owns the car. They put their name on it this year, but it won't be next year.
2. Roush's 2nd WC team ever was #16, with Dallenbach, Musgrave, and Lepage driving it in succession. They shut it down due to lack of sponsorship, and are now reviving it with Biffle behind the wheel. But I guess that doesn't explain why HAAS decided to use the number.