Only 20% of images with image-level labels downloadable through toolkit

I noticed that the image-level labeled images downloader couldn't find a lot of images in the bucket for image-level labeled images. On further inspection, I've realized that it downloads them from the same bucket as the bounding boxes, meaning that only around 2 million of the 10 million images are available. I appreciate that there is no bucket for the image-level labels, so I'm assuming this was intentional, but I think this limitation should be emphasized in the documentation for transparency.