htaccess redirect and duplicate content

Hi! I'm new to Drupal, but am trying out the tips I see in this group. They've been very helpful.

I recently just moved my old site, www.amici.com.ph to Drupal. I still have to learn how to do themes soon. The old links that were indexed by google, I used htaccess to redirect to relevant pages of the new website. Since the old links redirect to new pages, won't they be treated as pages with duplicate content?

Thanks!

William