Transferring Video to Computer Major Problem

Hi-
When I tried to transfer my Flip videos onto my Macbook computer, I copied them into a folder on my desktop from the camera. (The FLIPVIDEO icon is where I went to get the video to copy it to my desktop)
Then I deleted the video from the Flip by dragging it to the trash. The I realized that I made an error and didn't use the software that came with the camera, so I dragged the videos (AVI format) back onto the camera. Then I opened the software for the Flip, made an album for the videos, and then tried to delete them. The videos wouldn't delete due to an "unexpected error" I kept trying but it still wouldn't work.
Also, after I had made the error off dragging the videos off in the beginning, my camcorder said that it had no videos stored on it. It is a 60 minute Flip, but even though I had deleted all videos, I only had 44 minutes on the camera. Now I only have 20ish minutes left, and several videos back on the Flip. I should have many more than 20 minutes left. I don't know how to fix this, all I want is a cleared camera with 60 minutes again! Please Help me. thank you