First - yay! you did it!
Second - hmm ... not sure why it is small. I was going to say check size in Paint, but seems you already did that.
Try this - go to your PhotoBucket account. Click on the photo you uploaded. Underneath it you will see the image size. Mine that I posted is 800x614. This is in pixels.
If this is small, then the file you are uploading is small or it is being reduced when being uploaded. If this is large, then something is happening when it is displaying here on DIS.
So, what's the pixels show to be?