It depends on the colleges involved. I made a [url=http://talk.collegeconfidential.com/college-admissions/1576169-will-my-dual-enrollment-grades-follow-me-after-i-graduate.html#latest]thread[/url] about this topic a while ago and learned that the grades you receive in dual-enrollment classes won’t necessarily factor into the GPA calculated by other colleges. My university doesn’t attach letter grades to transferred classes.
Yes, because you’ll be required to submit transcripts from every college you’ve attended (even if you don’t transfer the classes).