Hey DJ Chance,
This is because you imported the photos to iPhoto and left them on the iPhone. When you import photos to iPhoto an option to delete originals is provided. You can delete the photos from the iPhone manually. Another option is delete the photos from iPhoto and import them again choosing to delete originals.
More information available in the iPhone User Guide.
+"If you’ve set iTunes to sync photos automatically, iTunes copies or updates your photo+
+library (or selected albums) from your computer to iPhone whenever you connect+
+iPhone to your computer."+ page 73
http://manuals.info.apple.com/en/iPhoneUserGuide.pdf
Jason