New 32gb CF card reduces to 8gb after formatting

I recently purchased a SanDisk Extreme 32 GB CF card for my Canon Rebel XT DSLR camera.

After I copy my photos to my hard drive, I usually reformat the CF card in the camera. I’ve noticed that after doing this, I am only left with 8 GB of memory. This has happened twice with two brand new SanDisk Extreme 32 GB CF cards purchased directly from Amazon. I have tried it on smaller capacity cards but it has not been an issue.

Has anyone else had this problem and is there any way to get it back to 32 GB?