How can i use cropping in imovie 11 on the clips that i cut away with and still put it in HD

Question

Hi there,
I do have one problem dealing with the videos I make in my iMovie 11: I want to set my videos to HD using Quicktime. I already know how to do that. But, the problem is that I use cropping and ken burn effects on my vids when I use cutaway (a really major problem since I use this most frequently in my videos), picture-in-picture, and side-by-side. After I exported my vids to Quicktime, I wanted to look at them. But, for some reason when I was watching my iMovie videos on Quicktime, it included every little bit of my clips. It didn't crop the clips at all. It showed everything. I'm kind of upset about this because I have projects due this month and I really didn't want part of some clips to show. I really needed them cropped and/or ken-burned. Plus, I need to set them on HD.
Whenever I played it back in the iMovie preview, my videos played exactly as I wanted it to play. The cutaway clips, picture-in-picture clips, and the side-by-side clips were cropped and ken-burned just as I wanted it to be. But, on my Quicktime, it didn't do the same.
Here's the procedure that I use to export my videos:
Step 1:  I finish making my video with the cutaway clips, picture-in-picture clips, and side-by-side clips already cropped and/or ken-burned.
Step 2:  I click on "Share." Then, I click on "Export using Quicktime."
Step 3:  I click on "Options."
Step 4:  I click on "Settings." Then, I make sure the Compression Type is H.264, Frame Rate is Current fps, Key Frames is on Every 24 frames, Frame Reordering is checked, Compressor Quality is on Best, Encoding is on Best Quality (Multi-pass), and the Data Rate is on Automatic. After this is done, I click "OK."
Step 5:  I click on "Size." I make sure the Dimensions is on 1920 x 1080 HD (mainly because I really need it in HD for doing projects for school and uploading other videos to Youtube, Dailymotion, and other sites). I also click on Preserve aspect ratio using: Letterbox. Then, I click "OK."
Step 6:  After I set the settings for Sound, I make sure that Prepare for Internet Streaming is on Fast Start. Then, I press "OK."
Step 7:  I save my file name and export to Quicktime.
Step 8:  Once it already exports to Quicktime, I open the file and look at my video that I just made. (At this point, I realized that my videos that were used as cutaways, picture-in-pictures, and side-by-side clips didn't show the parts I cropped or ken-burned on. It practically showed every little part of that clip that I use those effects on. I really wanted it to be cropped or ken-burned as much as possible.)
So, that's my problem that I have at the moment. I really needed it cropped and/or ken-burned and set the video on HD. I would really appreciate your thoughts on how I should fix this problem.

Answer 1

On one of my clips it says:
Format:  Apple Intermediate Codec, 1280 x 720, Millions
             16-bit integer (Little Endian), Stereo (L R), 48.000 kHz
Current Size: 1280 x 720 pixels (Actual)
Another clip I use says:
Format:  Apple Intermediate Codec, 960 x 540, Millions
             16-bit integer (Little Endian), Stereo (L R), 48.000 kHz
Current Size:  960 x 540 pixels (Actual)